Esther 5:13-14

Yet all this avails me nothing, so long as I see Mordecai the Jew sitting at the king’s gate.” Then his wife Zeresh and all his friends said to him, “Let a gallows be made, fifty cubits high, and in the morning suggest to the king that Mordecai be hanged on it; then go merrily with the king to the banquet.” And the thing pleased Haman; so he had the gallows made.