Esther 7:9-10

7:9 Harbona, one of the king’s eunuchs, said, “Indeed, there is the gallows that Haman made for Mordecai, who spoke out in the king’s behalf. It stands near Haman’s home and is seventy-five feet high.”

The king said, “Hang him on it!” 7:10 So they hanged Haman on the very gallows that he had prepared for Mordecai. The king’s rage then abated.