Psalm 58

An imprecatory psalm against corrupt rulers: shatter their teeth, may they dissolve like a slug, and the righteous washing their feet in the blood of the wicked. It's hard to read, and I won't pretend it's gentle. What it does say truly is that injustice by the powerful matters to God, and the longing for a God who judges is a righteous longing. Vengeance is asked of God, not taken by hand (compare Romans 12:19).

"Then men will say, “There is surely a reward for the righteous! There is surely a God who judges the earth!”" (Psalm 58:11)