1. For Solomon. O God, impart Your justice to the king, and Your righteousness to the son of the king.
2. May he judge Your people with righteousness, Your poor with justice.
3. May the mountains bear peace to the nation, also the hills, in [reward for their] righteousness.
4. May he judge the nation's poor, save the children of the destitute, and crush the oppressor,
5. so that they will fear You as long as the sun [shines] and the moon endures, generation after generation.

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. May [his words] descend like rain upon cut grass, like raindrops that water the earth.
7. In his days may the righteous flourish, with much peace until the moon is no more.
8. And may he rule from sea to sea, and from the river until the ends of the earth.
9. May nobles kneel before him, and may his enemies lick the dust.
10. The kings of Tarshish and the islands will return tribute, the kings of Sheba and Seba will offer gifts.
11. All kings will bow to him, all nations will serve him;
12. for he rescues the needy one who cries out, the poor one who has no one to help him.
13. He pities the impoverished and needy, and saves the souls of the destitute.
14. He redeems their soul from deception and violence, and their blood is precious in his eyes.
15. He revives [the poor], and gives him of the gold of Sheba; and so [the poor] pray for him always, and bless him all day.
16. May there be abundant grain in the land, upon the mountaintops; may its fruit rustle like the [cedars of] Lebanon, and may [people] blossom from the city like the grass of the earth.
17. May his name endure forever; may his name be magnified as long as the sun [shines]. And all nations will bless themselves by him, they will praise him.
18. Blessed is the Lord God, the God of Israel, Who alone performs wonders.
19. Blessed is His glorious Name forever, and may the whole earth be filled with His glory, Amen and Amen.
20. The prayers of David, son of Jesse, are concluded