6And when he learned the identity of Mordecai’s people, he scorned the notion of laying hands on Mordecai alone. Instead, he sought to destroy all of Mordecai’s people, the Jews, throughout the kingdom of Xerxes.
7In the twelfth year of King Xerxes, in the first month, the month of Nisan, the Pur (that is, the lot) was cast before Haman to determine a day and month. And the lot fell on the twelfth month, the month of Adar.
— Esther 3:6-7