פּירוש אויף אסתר 8:7

Here, [I have given] Haman’s estate, etc. And from now on everyone sees that I favor you,¹Achashveirosh’s reply does not address Esther’s request that he rescind Haman’s evil plans against the Jews. Therefore Rashi explains that the meaning of Achashveirosh’s reply was that, “from now on everyone sees....” (Sifsei Chachomim) and whatever you say, everyone will believe that it comes from me; therefore, you do not have to rescind them, but “write” other letters “as you please.”

“And the king said: I have given Haman’s house to Esther” [8:7]. Ahasuerus said to Mordecai: Esther is in deep mourning. She thinks that I will not save the people. Therefore, I am telling you that I have given the house of Haman to Esther and Haman was hanged. Thus, all the nations will be afraid; since Mordecai has been become the vizier and the house of Haman had been given to Esther. So all the nations have been warned not to do any evil to Israel. The king said to her: you should write letters to all the ministers that you would like and seal it with the king’s seal. That is, write the chief ministers that it had been written to inform them to destroy the Jews. This was a fraud committed by Haman and that is why he was hanged. However, the other letters that were written to the ordinary people, that they should be ready for a people and did not say which people. One can well understand that it must be a forgery, since that which the king himself commands is public and makes no secret of it. Therefore, one should be prepared to kill the Amalekites. Esther desired that there should be no war. She feared that Jews would also be killed in the war, heaven forbid. However, Ahasuerus said that it couldn’t be otherwise. They must fight since there has been a public announcement that there will be a war, so there must be a war.