Esther 3:5-7

Revised Standard Version Catholic Edition

⁵ And when Haman saw that Mor′decai did not bow down or do obeisance to him, Haman was filled with fury. ⁶ But he disdained to lay hands on Mor′decai alone. So, as they had made known to him the people of Mor′decai, Haman sought to destroy all the Jews, the people of Mor′decai, throughout the whole kingdom of Ahasu-e′rus.

⁷ In the first month, which is the month of Nisan, in the twelfth year of King Ahasu-e′rus, they cast Pur, that is the lot, before Haman day after day; and they cast it month after month till the twelfth month, which is the month of Adar.