1. Praise the Lord! Sing to our God for He is good; praise befits Him for He is pleasant.
2. The Lord is the rebuilder of Jerusalem; He will gather the banished of Israel.
3. He heals the broken-hearted, and bandages their wounds.
4. He counts the number of the stars; He gives a name to each of them.
5. Great is our Master and abounding in might; His understanding is beyond reckoning.

Tehillim Ohel Yoseph Yitzchok (Kehot Publication Society)

Tehillim is recited by Jewish people collectively and individually, as the desire occurs to offer praise and thanksgiving to G-d; or alternitavely, in times of crisis and need, as a form of supplication, and even as a venue to express regret for sin.

6. The Lord strengthens the humble; He casts the wicked to the ground.
7. Lift your voices to the Lord in gratitude; sing to our God with the harp.
8. He covers the heaven with clouds; He prepares rain for the earth, and makes grass grow upon the mountains.
9. He gives the animal its food, to the young ravens which cry to Him.
10. He does not desire [those who place their trust in] the strength of the horse, nor does He want those who rely upon the thighs [swiftness] of man.
11. He desires those who fear Him, those who long for His kindness.
12. Praise the Lord, O Jerusalem; Zion, extol your God.
13. For He has strengthened the bolts of your gates; He has blessed your children in your midst.
14. He has made peace within your borders; He satiates you with the finest of wheat.
15. He issues His command to the earth; swiftly does His word run.
16. He dispenses snow like fleece; He scatters frost like ashes.
17. He hurls His ice like morsels; who can withstand His cold?
18. He sends forth His word and melts them; He causes His wind to blow, and the waters flow.
19. He tells His words [Torah] to Jacob, His statutes and ordinances to Israel.
20. He has not done so for other nations, and they do not know [His] ordinances. Praise the Lord!