Esther 8:7-8

Then the king Ahasuerus said unto Esther the queen and to Mordecai the Jew, Behold, I have given Esther the house of Haman, and him they have hanged upon the gallows, because he laid his hand upon the Jews.

Write ye also for the Jews, as it liketh you, in the king's name, and seal it with the king's ring: for the writing which is written in the king's name, and sealed with the king's ring, may no man reverse.