1. A prayer by David. Hear my sincere [plea], O Lord; listen to my cry; give ear to my prayer, expressed by guileless lips.
2. Let my verdict come forth from before You; let Your eyes behold uprightness.
3. You have probed my heart, examined it in the night, tested me and found nothing; no evil thought crossed my mind; as are my words so are my thoughts.
4. So that [my] human deeds conform with the words of Your lips, I guard myself from the paths of the lawbreakers.
5. Support my steps in Your paths, so that my feet shall not falter.

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. I have called upon You, for You, O Lord, will answer me; incline Your ear to me, hear what I say.
7. Withhold Your kindness-O You who delivers with Your right hand those who put their trust in You-from those who rise up against [You].
8. Guard me like the apple of the eye; hide me in the shadow of Your wings
9. from the wicked who despoil me, [from] my mortal enemies who surround me.
10. Their fat has closed [their hearts]; their mouths speak arrogantly.
11. They encircle our footsteps; they set their eyes to make us stray from the earth.
12. His appearance is like a lion longing to devour, like a young lion lurking in hiding.
13. Arise, O Lord! Confront him, bring him to his knees; rescue my soul from the wicked [who serves as] Your sword.
14. Let me be among those whose death is by Your hand, O Lord, among those who die of old age, whose portion is eternal life and whose innards are filled with Your concealed goodness; who are sated with sons and leave their abundance to their offspring.
15. Because of my righteousness, I shall behold Your countenance; in the time of resurrection, I will be sated by Your image.