1. A song, a psalm by David.
2. My heart is steadfast, O God; I will sing and chant praises even with my soul.
3. Awake, O lyre and harp; I shall awaken the dawn.
4. I will thank You among the nations, Lord; I will sing praises to You among the peoples.
5. Indeed, Your kindness reaches above the heavens; Your truth reaches to the skies.

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. Be exalted upon the heavens, O God, [show] Your glory upon all the earth.
7. That Your beloved ones may be delivered, help with Your right hand and answer me.
8. God spoke in His holiness that I would exult, I would divide portions [of the enemies' land], I would measure the Valley of Succot.
9. Mine is Gilead, mine is Manasseh, and Ephraim is the stronghold of my head, Judah is my prince.
10. Moab is my washbasin, I will cast my shoe upon Edom, I will shout over Philistia.
11. Who brings me to the fortified city? Who led me unto Edom?
12. Is it not God, Who has [until now] forsaken us, and did not go forth, O God, with our armies?
13. Give us help against the adversary; futile is the help of man.
14. Through God we will do valiantly, and He will trample our oppressors.