Esther 5:8

5:8 If I have found favor in the king’s sight and if the king is inclined to grant my request and perform my petition, let the king and Haman come tomorrow to the banquet that I will prepare for them. At that time I will do as the king wishes.

Esther 5:14

5:14 Haman’s wife Zeresh and all his friends said to him, “Have a gallows seventy-five feet high built, and in the morning tell the king that Mordecai should be hanged on it. Then go with the king to the banquet contented.”

It seemed like a good idea to Haman, so he had the gallows built.

Esther 6:13

6:13 Haman then related to his wife Zeresh and to all his friends everything that had happened to him. These wise men, along with his wife Zeresh, said to him, “If indeed this Mordecai before whom you have begun to fall is Jewish, you will not prevail against him. No, you will surely fall before him!”

Esther 9:16

9:16 The rest of the Jews who were throughout the provinces of the king assembled in order to stand up for themselves and to have rest from their enemies. They killed seventy-five thousand of their adversaries, but they did not confiscate their property.