Then were the king's scribes called This he did so speedily, though it was a year before the intended execution, lest the king should change his mind, either through his own clemency, or the persuasion of others. It was, however, not wisely judged to let his design be known so long before it was to take effect; for the Jews might find some way to deliver themselves, or might steal out of the kingdom: but undoubtedly this was so ordered by the overruling providence of God. And to take the spoil of them for a prey Which was to induce the people to use the greater severity and readiness to execute this edict for their own advantage.
Esther 3:12-13
12 Then were the king's scribesb called on the thirteenth day of the first month, and there was written according to all that Haman had commanded unto the king's lieutenants, and to the governors that were over every province, and to the rulers of every people of every province according to the writing thereof, and to every people after their language; in the name of king Ahasuerus was it written, and sealed with the king's ring.
13 And the letters were sent by posts into all the king's provinces, to destroy, to kill, and to cause to perish, all Jews, both young and old, little children and women, in one day, even upon the thirteenth day of the twelfth month, which is the month Adar, and to take the spoil of them for a prey.