Psalms 37:8

Cease from anger,.... Either at these wicked men who are so prosperous, or at God, who for the present suffers it; see Jonah 4:9

Proverbs 19:3;

and forsake wrath; which is anger wrought up to a greater degree; and the rather to be shunned and avoided, as being very disagreeable to the character of a good man;

fret not thyself in any wise to do evil; evil may be done by fretting at the prosperity of wicked men, or by imitating them, doing as they do, in hope of being prosperous as they are; from which the psalmist dissuades by reasons following.