Psalms 59:15

15. Let them wander Or, they shall wander. The metaphor of hungry dogs prowling about the city for some offal to alleviate their hunger, but finding nothing, is here carried out to illustrate that God would punish these conspirators through their own bloodthirsty passions, by withholding the object of their desire and defeating their deadly schemes. Thus sin becomes an instrument of its own punishment.

Grudge The Hebrew word should here take its more usual sense of to tarry, lodge, continue. The sense is: “If these hungry dogs, prowling for food, be not satisfied, they will continue all night, even to exhaustion, in their fruitless search.” This completes the metaphor, and finishes the picture of their wretchedness.