Esther 5:8, 14

if I have found favor in the sight of the king, and if it pleases the king to grant my petition and to do as I request, may the king and Haman come to the banquet that I will prepare for them; and tomorrow I will do as the king says [and express my request].”

Then his wife Zeresh and all his friends said to him, “Have a gallows fifty cubits high made, and in the morning ask the king to have Mordecai hanged on it; then go joyfully to the banquet with the king.” And the advice pleased Haman, so he had the gallows made.