Psalm 37
A long, slow acrostic for anyone churning over bad people who prosper. "Do not fret" appears three times. The remedy is a series of quiet verbs: trust, do good, dwell, delight, commit, be still, wait. Verse 25 is an old man's testimony, not a guarantee for every case, and other psalms (44, 73, 88) complain honestly when it doesn't seem to hold. Jesus quotes verse 11 in Matthew 5:5.
"Commit your way to the LORD; trust in Him, and He will do it." (Psalm 37:5)
Versions/Hebrew: In 37:5, "commit" is gol from galal [1556], to roll; YLT: "Roll on Jehovah thy way." "Fret" in 37:1, 7, 8 is titchar [2734], to get yourself heated, to burn. "Be still" in 37:7 is dom [1826], be silent.