Psalms 58:10

10 The righteous shall rejoice when he seeth the vengeance; he shall wash his footsteps in the blood of the wicked:

Psalms 58:10 In-Context

8 Let them be as a snail that melteth as it passeth away; [like] the untimely birth of a woman, let them not see the sun.
9 Before your pots feel the thorns, green or burning, -- they shall be whirled away.
10 The righteous shall rejoice when he seeth the vengeance; he shall wash his footsteps in the blood of the wicked:
11 And men shall say, Verily there is fruit for the righteous; verily there is a God that judgeth in the earth.
The Darby Translation is in the public domain.