PSALM 37[A Psalm] of David. This psalm, it is very probable, was written at the same time, and upon the same occasion, with the former; and describes the different states of good and bad men; and is full of exhortations, instructions, and advice to the people of God; intermixed with various encouraging promises.
A late learned writer thinks it was written for Mephibosheth's consolation under Ziba's calumny. Delaney's Life of King David, vol. 2. p. 219.Ver. 1. Fret not thyself because of evildoers,.... The saints may be grieved at them and for them, because of their evil doings, and may be angry with them for them; yet are not to show any undue warmth, at least in an indecent way, by calling them opprobrious names; for the words may be rendered, "do not show thyself warm" or "angry" : in a sinful way; or fret not at their outward prosperity, as it is explained Ps 37:7.