Tehillim / Psalms 58 verses 11 and 12 as translated by Sefaria.org
The righteous man will rejoice when he sees revenge;
he will bathe his feet in the blood of the wicked.
Men will say,
“There is, then, a reward for the righteous;
there is, indeed, divine justice on earth.”
May he receive the same treatment in Gehenom as Haman and Hitler!