Esther 8:10-12

And he wrote in the name of King Ahasuerus, sealed it with the king’s signet ring, and sent letters by couriers on horseback, riding on royal horses bred from swift steeds. By these letters the king permitted the Jews who were in every city to gather together and protect their lives—to destroy, kill, and annihilate all the forces of any people or province that would assault them, both little children and women, and to plunder their possessions, on one day in all the provinces of King Ahasuerus, on the thirteenth day of the twelfth month, which is the month of Adar.