1. For the Conductor, by David. I have placed my trust in the Lord; [thus] how can you say of my soul, your mountain,1 that it flees like a bird?2
2. For behold, the wicked bend the bow, they have readied their arrow upon the bowstring, to shoot in darkness at the upright of heart.
3. They destroyed the foundations; 3 what [wrong] has the righteous man done?
4. The Lord is in His holy Sanctuary, the Lord's throne is in heaven, [yet] His eyes behold, His pupils probe [the deeds of] mankind.
5. The Lord tests the righteous, but He hates the wicked and the lover of violence.

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. He will rain down upon the wicked fiery coals and brimstone; a scorching wind will be their allotted portion.
7. For the Lord is righteous, He loves [the man of] righteous deeds; the upright will behold His countenance.