Esther 3:1, 5-6

After these things King Ahasuerus (Xerxes) promoted Haman, the son of Hammedatha the Agagite, and advanced him and established his authority over all the officials who were with him.

When Haman saw that Mordecai neither bowed down nor paid homage to him, he was furious. But he disdained laying hands on Mordecai alone, for they had told him who the people of Mordecai were (his nationality); so Haman determined to destroy all the Jews, the people of Mordecai, who lived throughout the kingdom of Ahasuerus.