Here is a site which discusses the 39 categories of forbidden work on the Sabbath:
http://www.torahtots.com/torah/39melachot.htm
THE 39 MELACHOT
Lamed-Tet Melachot
PLEASE NOTE: This is just a VERY BASIC introduction. There are many complex laws regarding Shabbat, and this is not the forum for decisions regarding what is or is not allowed on Shabbat. This is just to give the reader a flavor of the intricate halachot involved. A competent halachic authority should be consulted with any questions.
Melacha (plural "melachot").
1. Melacha refers to the 39 categories of activity that are forbidden on Shabbat. Melacha, is not "work." At least not the English definition of the word "work." You may not carry a needle out into the street on Shabbat, yet you may drag a heavy sofa across the room. So what Melacha is forbidden on Shabbat?
The 39 categories of activity that are forbidden on Shabbat, are all labors that have something in common - they are creative activities that exercise control over one's environment.
Specifically, the Talmud derives these 39 categories from the fact that the Torah juxtaposes the commandment to cease work on Shabbat in Shmot Parashat Vayakheil, with its detailed instructions on how to build the Mishkan*, and the preparation of its components, as described in Shmot / Exodus 31 and 35.
*[Mishkan - Tabernacle; the portable, temporary version of the Holy Temple that the Jews carried throughout the forty years in the desert into Eretz Yisroel (the land of Israel), until they built the Beit HaMikdash]
This is to teach us, explains the Talmud (Shabbat 49b), which activities constitute melacha: any creative act that was part of the mishkan's construction represents a category of work forbidden on Shabbat. These categories are forbidden by the Torah.
2. Toldot - Work which is different from that done in the Mishkan, but which achieves the same result. These types of melacha are also prohibited by the Torah.
3. Rabbinic Decrees - There are a number of additional activities that are forbidden by the Rabbis. There are several categories of decrees that prohibit:
a. Activities that might lead directly to the violation of a Torah prohibition.
b. Use of items not designated for Shabbat use (muktzah).
c. Activities that might lead one to think that a prohibited activity is permissible (Ma'arit Ayin - The appearance of the eye).
d. Activities that are not appropriate for Shabbat, even though they are technically permissible (Uvda D'Chol - [resembles] weekday activity). The Navi Yeshayahu (Prophet Isaiah (58:13-14) recorded a prohibition against speaking of business and against weekday-oriented activities.
Here is the list of the 39 Melachot (main activities) prohibited on the Shabbat as listed in the Mishna Shabbat 73a:
1. Zoreah - Sowing (seeding)
2. Choresh - Plowing
3. Kotzair - Reaping (cutting)
4. M'amair - Gathering (bundling sheaves)
5. Dush - Threshing
6. Zoreh - Winnowing
7. Borer - Sorting (selecting, separating)
8. Tochain - Grinding
9. Miraked - Sifting
10. Lush - Kneading
11. Ofeh / (Bishul) - Baking/cooking
12. Gozez - Shearing
13. Melabain - Whitening (bleaching)
14. Menafetz - Disentangling, Combing
15. Tzovayah - Dyeing
16. Toveh - Spinning
17. Maisach - Mounting the warp (stretching threads onto loom)
18. Oseh Beit Batai Neirin - Setting two heddles (preparing to weave)
19. Oraig - Weaving
20. Potzai'ah - Separating (removing) threads (Unweaving)
21. Koshair - Tying a knot
22. Matir - Untying a knot
23. Tofair - Sewing
24. Ko'reah - Tearing (unsewing - ripping)
25. Tzud - Trapping
26. Shochet - Slaughtering (Killing)
27. Mafshit - Skinning
28. M'abaid - Salting/tanning process [1]
29. Mesharteit - Tracing (scratching) lines
30. Memacheik - Smoothing / scraping
31. Mechateich - Cutting (to shape)
32. Kotaiv - Writing two or more letters
33. Mochaik - Erasing two or more letters
34. Boneh - Building
35. Soiser - Demolishing
36. Mechabeh - Extinguishing (putting out a flame)
37. Ma'avir - Kindling (making a fire)
38. Makeh B'Patish - Striking the final blow (Finishing an object)
39. Hotza'ah - Transferring (transporting) from domain to domain (carrying)
[1] The list of Melachot in the Talmud (Tractate Shabbat 7:2) includes salting hides and tanning as separate Melachot. The Talmud (Tractate Shabbat 75b) states that these two are really the same Melacha, and amends the Mishna by inserting tracing lines, as the twenty-ninth Melacha.
These 39 Melachot are divided into six (6) groups:
Group I = Numbers 1-11
Group II = Numbers 12-24
Group III = Numbers 25-31
Group IV = Numbers 32-33
Group V = Numbers 34-35
Group VI = Numbers 36-39
Group V = Numbers 34-35
Group VI = Numbers 36-39
Group I is connected to the field work.
Group II is connected to the making material curtains
Group III is connected to the making of leather curtains
Group IV is connected to the Krushim (beams of the Mishkan)
Group V is connected to the putting the walls of the Mishkan up and down
Group VI is connected to the final touches of the Mishkan
1. Zoreah - Sowing (seeding)
The first of the thirty-nine melachot is zoreah, sowing. Zoreah includes planting, sowing, or watering seeds to induce or encourage growth. This melacha is only transgressed in a place where a seed could grow. Therefore, if one drops a seed in the desert or on a well-traveled road where it would be crushed, one has not violated the prohibition of zoreah. It is also not considered zoreah to feed seeds to chickens in a coop where it is very likely that the chickens will eat all of the seeds before they can germinate.1
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2. Choresh - Plowing
Choresh, or plowing, is the second of the thirty-nine prohibited melachot. It is prohibited to plow the ground---to level it off or make holes in it, like the holes used for planting seeds. Dragging a heavy lawn chair in one's backyard, (a really heavy lawn chair), is considered plowing, if it makes holes in the ground, and is thus prohibited on Shabbat. However, a distinction may be made between making holes in the ground and making mere compressions in the ground. The latter, which is what wheels of a wheelchair or a baby carriage might do to the ground, is permissible on Shabbat. Pushing the ground down and consolidating it, is halachically different than puncturing the surface of the ground. So, baby carriages on a dirt roads, are OK.1
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3 - Kotzair - Reaping (cutting) Harvesting
Kotzair, the third of the thirty-nine melachot is the uprooting or severing of any living plant or vegetation from its source of growth. Thus, one may not uproot plants, branches, or even just one leaf. Plucking a flower, picking fruit from a tree, vegetables from a garden, or mushrooms from the forest floor are actions all prohibited under the category of kotzair because these actions involve severing a living plant or part of a living plant from its source of growth. [Mushrooms, in other areas of Halacha, Jewish law, are not classified at plants for they do not "grow FROM the ground" but "grow ON the ground." (Thus someone about to eat a mushroom should make the blessing Shehakol - appropriate for milk, water, and foods that do not grow from the ground - and not make the blessing HaAdamah). But with respect to kotzair, mushrooms are Halachically equated as plant life for they draw nutrients from the soil, and thus should not be separated from their source of growth on Shabbat.1] The next time you have an urge to puncture the trunk of a sugar maple tree and drain its syrupy sap, think again! According to some Rabbis, draining the sap is equivalent to uprooting the sap from its source of growth, in this case the tree, and is thus a transgression of Kotzair. Picking grapes from their stems, however, is allowed, provided that grape bunches have already been detached from the vine on which they grew.
Mowing a lawn is kotzair. We also may not handle any growing flowers or plants. It is also forbidden to climb a tree or smell an attached fruit, but it is permitted to smell a growing flower.1
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4 - M'amair - Gathering (bundling sheaves)
Gathering is the fourth of the thirty-nine Melachot. Gathering consists of collecting natural produce into a bundle. The prohibition, in fact, only applies to natural produce - gathering manufactured products is completely permitted. So there's no need to stop your little brother from collecting the candy bags after they have been throw at the Bar-Mitzvah boy. Actions that would fall under this category would be piling scattered fruit, putting together a bouquet of flowers, or stringing figs (something that was much more common in the time of the Mishna than it is today). Although this Melacha seems rather innocuous compared to such heavy-hitters as writing, plowing, and lighting a fire, it was the Melacha done by the first person to ever violate Shabbat, the wood-gatherer, in Bamidbar / Numbers 15:32.
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5 - Dush - Threshing
The fifth of the 39 melachot, is Disha, or threshing. Its purpose is to separate kernels of grain from their husks, and it has been expanded to include the removal of any wanted item ( known as 'ochel') from its unwanted natural container ( known as 'pesolet'). This has ramifications in terms of a subcategory of disha, namely s'chita, or squeezing.
One is not permitted to squeeze the juice out of a fruit on Shabbat.
However, there are a few legitimate ways to remove the juice from the fruit:
1)Suck out the juice, as it is a shinuy, or change, from the usual manner of squeezing out juice.
2)Squeeze juice out purely for the intention of improving the taste of the fruit, even if you keep the juice.
3)Squeeze the juice straight onto a solid that will absorb it.
(It should be noted that Rabbeinu Chananel prohibits this third activity, although he is in the minority. However, even he would allow the squeezing of lemon onto a solid.)
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6- Zoreh - Winnowing
The sixth melacha is zoreh, winnowing. Winnowing is a fundamental step in harvesting wheat because it separates the grain from the waste. In the mishkan, wheat was grown for the Lechem HaPanim, the showbread. After threshing, the kernels and the chaff would be left together on the ground, and the farmer would take a pitchfork, and throw a mixture of it in the air. The waste would blow away, leaving the heavier kernels. Many commentators explain that the melacha of zoreh is similar to borer, sorting or separating, and miraked, sifting, in that the main point of each melacha is separating the bad from the good. One way of explaining the difference between the three is by the means used for each; zoreh is through wind, borer is by hand, and meraked is through a sifting device. One may not blow away nutshells from a mixture of nuts and shells.
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7 - Borer - Sorting (selecting, separating)
The seventh of the 39 melachot, is borer, or sorting. It is any form of selecting or sorting inedible matter from food by hand. This includes removing undesired objects or matter from a mixture or combination such as removing spoiled cherries from a bowl of cherries or removing bones from a fish. (Gefilte fish is the traditional Ashkenazi solution to this problem.) Borer also includes the sorting of nonfood items mixed together, such as sorting dirty silverware from a mixture of clean and dirty silverware.
Sorting is only permitted when ALL of the following three conditions are met:
1) The selection is done by hand.
2) The desired objects are selected from the undesired, and not the reverse.
3) The selection is done immediately before the time of use.
For example, if one has a bowl of mixed almonds and raisins and wants only the raisins, you must remove the raisins by hand, remove the raisins from the almonds, and intend to eat all the selected raisins immediately after removing them. This description of the complex melacha of Borer is very simplified, see note above.
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8 - Tochain - Grinding
The eighth of the 39 melachot, is tochain, or grinding. Tochain is defined as the act of breaking down an entity into small parts whereby it becomes suitable for a new use, such as grinding wheat into flour. Any kind of normal crushing, chopping, or grinding, by hand, or with a tool, falls under this category. There are four exceptions to Tochain: it only applies to earth-grown products; previously ground substances may be crushed again; food may be ground for immediate use; and substances may be ground in an abnormal manner.
In the time of the Talmud, medicines were ground up from herbs and other vegetable sources. Because of this, taking any form of medication was Rabbinically prohibited (except in life-threatening situations) to safeguard the melacha. Since the reasoning behind this prohibition no longer applies today, the details of its application have become very complicated. In brief, one is allowed to take medicine only for illnesses that weaken the entire body or that are very painful. Medicine should not be taken for slight aches or a cold. This aspect of tochain contains many more details, and 'The 39 Melachot,' Vol. 2, by Rabbi Dovid Ribiat is a good place to find out about them.
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9 - Miraked - Sifting
The ninth melacha, is miraked or sifting. How then, does it differ from borer, which also involves separating undesired from desired items? One suggestion is that meraked is the sifting specifically done with a keli, or instrument, especially designed for the purpose of straining, such as a sieve. Sifting flour to make it finer, or sifting the pebbles out of a pile of sand would be good example of miraked, while merely picking the pebbles out by hand would be termed borer (by the way, the pebbles themselves are generally muktza, thus making this whole activity a rather bad idea on Shabbat). Some Rishonim, (early Sages), make another distinction between miraked and borer, namely that borer is defined as removing the bad from the good, whereas miraked involves allowing the items that one wishes to keep, to pass through the strainer, retaining only the garbage on the face of the strainer. It includes the sifting of flour and the straining of liquids.
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10 - Lush - Kneading
Lush, or kneading, is the act of forming a solid or semi-solid substance of particles using a liquid. There are two steps in this process: contact of the liquid with the flour, and the mixing of the two with a kneading action. Some examples of lush are mixing water with sand to produce thick mud, mixing water and powder to make thick paste, and making plaster. There are many facets to this melacha which should be researched further, but it is interesting to note that, according to The 39 Melochot by Rabbi Dovid Ribiat (p. 527-49), it is permitted to soak matzah in soup or to dunk cookies in milk because these foods disintegrate when in contact with liquids.
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11- Ofeh / Bishul - Baking / Cooking
The prohibition of Ofeh / Bishul is generally understood to be the causing of a change in the properties of a food or substance by use of heat. This includes cooking raw food until it becomes edible and causing change in nonfoods as well, such as the baking of bricks. If one were to place raw food on a flame, one should, and is required, to remove the pot before the raw food cooks. Generally, bishul does not occur in solid foods until the raw solid, or even part of it, becomes minimally edible. Liquids, however, since they are dramatically approved when heated, need only to be warmed and not physically changed by heat to be considered a violation of bishul. The minimum amount of heat needed to make substantial change is known as "Yad Soledet," (hand draws back) and is the degree of heat from which a person, upon contact, reflexively removes his hand ("hot to the touch").
With this definition of the melacha of Ofeh / Bishul, the eleventh of the 39 categories of work prohibited on Shabbat, we have completed what the Talmud (Tractate Shabbat 74b) calls the "sidura d'pas," the "order of (making) bread," which were the steps taken to cultivate wheat for the Lechem Hapanim (Show Bread) and grow other ingredients essential in the production of dyes that colored the wool curtains and tapestries of the Mishkan. To recap, these steps are: plowing, sowing, reaping, gathering, threshing, winnowing, sorting, grinding, sifting, kneading, and lastly baking / cooking. Baking itself was not performed during the actual construction of the Mishkan since bread was not required for the structure. It was only herbs that were cooked to produce the dyes.
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12 - Gozez / Shearing
The melacha of Gozez is the first in a group of thirteen Melachot that make up the essential steps in the processing of wool fabrics and garments. The cloth coverings of the Mishkan were made from wool, and the first step in the process was shearing it from the animal. The melacha consists of severing or uprooting any growing part of any creature, even if the creature is dead. The melacha truly only entails removing with an instrument such as clippers or scissors, but the Rabbis later included any type of hair removal. This melacha has a number of important implications, even for those of us who don't own sheep. One may not comb their hair on Shabbat because a comb will definitely pull out hairs. Instead, one may gently use a soft-bristle brush. Cutting or biting one's nails on Shabbat is also prohibited, and one may not pull off loose or dead skin.
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13 - Melabain - Whitening (bleaching)
The sheared wool needed for the Mishkan was washed in a river. The Melacha of Melabein, literally "whitening," is expressed through three categories of activity: Shriyah, or soaking, Shifshuf, or scrubbing, and Sechita, or squeezing. More commonly, melabein is the act of cleaning on Shabbat, which is prohibited. Here are some halachot that explains what is forbidden in each one of those categories:
1) Soaking - One may not pour anything (that includes, water, seltzer, etc.) or spray anything on a stain to loosen it or erase it from one's clothes completely. Remember that when you spill something on yourself at lunch. Everyone's knee-jerk reaction, of course, is to reach for the seltzer.
2) Scrubbing - This prohibition includes folding over part of one's clothing to rub it against the stained spot in order to remove the stain. It also includes scratching out a dried stain from one's clothes with one's fingernail.
3) Squeezing - This category includes wringing out one's clothes on Shabbat. The good news, though, is that the prohibition of squeezing things out does not apply to sprinkling one's hair with water to hold down 'the frizz.' But, just watch yourselves. A sprinkle is OK, not a shower!
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14. Menafetz - Disentangling, Combing Raw Materials
After bleaching the wool, the next step is to comb the tangled threads to prepare it for spinning / weaving (by hand and with a comb). The prohibition of menafetz applies to the act of beating compact material into separate strands. This includes one who combs wool or beats flax stalks or any similar process. Some add that menafetz also applies to loose hair, in which case combing a wig is also prohibited on Shabbat.
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Continued in the next post...