One of my favorite Tehillim from Shabbat davening is Tehillim 145:
Tehillim - Psalms - Chapter 145
1. A praise of David. I shall exalt You, my God the King, and I shall bless Your name forever and ever.
2. Every day I shall bless You, and I shall praise Your name forever and ever.
3. The Lord is great and very much praised, and His greatness cannot be searched.
4. Generation to generation will praise Your works, and they will recite Your mighty deeds.
5. Of the majesty of the glory of Your splendor and the words of Your wonders I shall speak.
6. And the strength of Your awesome deeds they will tell, and Your greatness I shall sing.
7. Of the remembrance of Your abundant goodness they will speak, and of Your righteousness they will sing.
8. The Lord is gracious and compassionate, slow to anger and of great kindness.
9. The Lord is good to all, and His mercies are on all His works.
10. All Your works will thank You, O Lord, and Your pious ones will bless You.
11. They will tell the glory of Your kingdom, and they will speak of Your might.
12. To make known to the children of men His mighty deeds and the glory of the majesty of His kingdom.
13. Your kingdom is a kingdom of all times, and Your ruling is in every generation.
14. The Lord supports all those who fall and straightens all who are bent down.
15. Everyone's eyes look to You with hope, and You give them their food in its time.
16. You open Your hand and satisfy every living thing [with] its desire.
17. The Lord is righteous in all His ways and kind in all His deeds.
18. The Lord is near to all who call Him, to all who call Him with sincerity.
19. He does the will of those who fear Him, and He hears their cry and saves them.
20. The Lord guards all who love Him, and He destroys all the wicked.
21. My mouth will speak the praise of the Lord, and all flesh will bless His holy name forever and ever.