Esther 2:4

2:4 Let the young woman whom the king finds most attractive become queen in place of Vashti.” This seemed like a good idea to the king, so he acted accordingly.

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.