1. For the Conductor, a psalm by David.
2. Fortunate is he who is thoughtful of the poor, [for] the Lord will save him on the day of evil.
3. The Lord will guard him and keep him alive; he will be praised throughout the land; You will not deliver him to the desires of his enemies.
4. The Lord will support him on the bed of illness; You will turn him over in his bed all throughout his sickness.
5. I said, "Lord, be gracious to me! Heal my soul, for I have sinned against You!”

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. My foes say that evil [awaits] me: "When will he die, and his name perish?”
7. And if one comes to see [me], he speaks insincerely, for his heart gathers iniquity for himself, and when he goes out he speaks of it.
8. Together they whisper against me-all my enemies; against me they devise my harm, [saying]:
9. "Let his wickedness pour into him; now that he lies down, he shall rise no more.”
10. Even my ally in whom I trusted, who ate of my bread, has raised his heel over me.
11. But you, Lord, be gracious to me and raise me up, and I will repay them.
12. With this I shall know that You desire me, when my enemies will not shout gleefully over me.
13. And I, because of my integrity, You upheld me; You set me before You forever.
14. Blessed is the Lord, the God of Israel, to all eternity, Amen and Amen.