Esther 9:1-2

Now in the twelfth month (that is, the month Adar), on the thirteenth day when the king’s command and edict were about to be executed, on the day when the enemies of the Jews hoped to gain the mastery over them, it was turned to the contrary so that the Jews themselves gained the mastery over those who hated them. The Jews assembled in their cities throughout all the provinces of King Ahasuerus to lay hands on those who sought their harm; and no one could stand before them, for the dread of them had fallen on all the peoples.