Let the robes and the horse be handed over to one of the king's most noble officials; let him robe the man whom the king wishes to honor, and let him conduct the man on horseback through the open square of the city, proclaiming before him: "Thus shall it be done for the man whom the king wishes to honor.' "
References for Esther 6:9
Then the king said to Haman, "Quickly, take the robes and the horse, as you have said, and do so to the Jew Mordecai who sits at the king's gate. Leave out nothing that you have mentioned."
So Haman took the robes and the horse and robed Mordecai and led him riding through the open square of the city, proclaiming, "Thus shall it be done for the man whom the king wishes to honor."
Then Mordecai returned to the king's gate, but Haman hurried to his house, mourning and with his head covered.
When Haman told his wife Zeresh and all his friends everything that had happened to him, his advisers and his wife Zeresh said to him, "If Mordecai, before whom your downfall has begun, is of the Jewish people, you will not prevail against him, but will surely fall before him."
While they were still talking with him, the king's eunuchs arrived and hurried Haman off to the banquet that Esther had prepared.