Genesis 27:36

And he said, Is not he rightly named Jacob (heel-catcher, supplanter) ? For he hath supplanted me these two times; he took away my birthright; and, behold, now he hath taken away my blessing. Esau was now in a state of mind which prevented his proper repentance, for there was no excuse for his selling his birthright. And he said, Hast thou not reserved a blessing for me? Just as though Isaac was able to set aside such blessings at will.