Uh, It was this last weeks portion... And week before that's portion (Re'eh)..
Re'eh:
13:
7. If your brother, the son of your mother, tempts you in secret or your son, or your daughter, or the wife of your embrace, or your friend, who is as your own soul saying, "Let us go and worship other gods, which neither you, nor your forefathers have known."
8. Of the gods of the peoples around you, [whether] near to you or far from you, from one end of the earth to the other end of the earth;
9. You shall not desire him, and you shall not hearken to him; neither shall you pity him, have mercy upon him, nor shield him.
Shoftim:
17:
2. If there will be found among you, within one of your cities which the Lord, your God is giving you, a man or woman who does evil in the eyes of the Lord, your God, to transgress His covenant,
3. and who will go and worship other gods and prostrate himself before them, or to the sun, the moon, or any of the host of the heavens, which I have not commanded;
4. and it will be told to you, and you will hear it, and investigate thoroughly, and behold, the matter coincides; this abomination has been perpetrated in Israel.