In his dismay, Isaac had had the intention of cursing Jacob for having wrested the blessing from him through cunning. God prevented him from carrying out his plan. He reminded him that he would but curse himself, seeing that his blessing contained the words, "Cursed be every one that curseth thee." But Isaac was not willing to acknowledge his blessing valid as applied to Jacob, until he was informed that his second son was the possessor of the birthright.
Only then did he say, "Yea, he shall be blessed," whereat Esau cried with an exceeding great and bitter cry. By way of punishment for having been the cause of such distress, a descendant of Jacob, Mordecai, was also made to cry with a loud and bitter cry, and his grief was brought forth by the Amalekite Haman, the descendant of Esau. At the words of Isaac, "Thy brother came with wisdom, and hath taken away thy blessing," Esau spat out in vexation, and said, "He took away my birthright, and I kept silence, and now that he takes away my blessing, should I also keep silence? Is not he rightly named Jacob? for he hath supplanted me these two times."