Esther 3:4

Now, it came to pass, when they spake daily unto him and he hearkened not unto them, that they told Haman to see whether Mordecai's matters would stand, whether he would succeed in upholding the principle which he alleged in explanation of his action; for he had told them that he was a Jew, wherefore he could not give divine homage to Haman, especially since the latter was an Amalekite, a race accursed and condemned by God, Exodus 17:15; 1 Samuel 15.