Esther 3:5-7

When Haman saw that Mordecai would not bow down to him or honor him, he became very angry. He thought of himself as too important to try to kill only Mordecai. He had been told who the people of Mordecai were, so he looked for a way to destroy all of Mordecai’s people, the Jews, in all of Xerxes’ kingdom. It was in the first month of the twelfth year of King Xerxes’ rule—the month of Nisan. Pur (that is, the lot) was thrown before Haman to choose a day and a month. So the twelfth month, the month of Adar, was chosen.