Esther 7:9-10

Then Harbonah, one of the eunuchs who were before the king said, “Behold indeed, the gallows standing at Haman’s house fifty cubits high, which Haman made for Mordecai who spoke good on behalf of the king!” And the king said, “Hang him on it.” So they hanged Haman on the gallows which he had prepared for Mordecai, and the king’s anger subsided.