Psalm 58:10 in the King James Version
The righteous shall rejoice when he seeth the vengeance: he shall wash his feet in the blood of the wicked.
Context
9 Before your pots can feel the heat of the thorns, he will sweep away the green and the burning alike.
10 The righteous shall rejoice when he sees the vengeance. He shall wash his feet in the blood of the wicked,
11 so that men shall say, “Most certainly there is a reward for the righteous. Most certainly there is a God who judges the earth.”