פירוש על אסתר 3:4

If Mordechai’s avowal would be sustained. Who said that he would never prostrate himself because he is a Jew, and was admonished against idolatry.³Esther Rabbah 7:8. When his servants told him that Mordechai refused to kneel, Haman remarked that Mordechai’s ancestors, Yaakov, Rachel and their children had prostrated themselves before Eisav, Haman’s ancestor. Upon hearing Haman’s remark, Mordechai replied that he was a descendant of Binyamin, who was born after Yaakov’s meeting with Eisav, and who had thus never prostrated himself before Eisav. Alternatively, היעמדו דברי מרדכי means “whether Mordechai’s words will avail,” i.e., if his actions were successful they would become a precedent for others to follow.