Esther 8:7-8

7Then King Ahasuerus said to Queen Esther and Mordecai the Jew, “Indeed, I have given Esther the house of Haman, and they have hanged him on the gallows because he tried to lay his hand on the Jews.

8You yourselves write a decree concerning the Jews, as you please, in the king’s name, and seal it with the king’s signet ring; for whatever is written in the king’s name and sealed with the king’s signet ring no one can revoke.”