Esther 8:1-3

On that day King Ahasuerus (Xerxes) gave the house of Haman, the enemy of the Jews, to Queen Esther; and Mordecai came before the king, because Esther had disclosed what [relation] he was to her. The king took off his signet ring which he had taken away from Haman, and gave it to Mordecai. And Esther put Mordecai in charge of the house of Haman. Then Esther spoke again to the king and fell down at his feet and wept and implored him to avert the evil plot of Haman the Agagite and his plan which he had devised against the Jews [because the decree to annihilate the Jews was still in effect].