But Esau would not kill Jacob while his father was yet alive, lest Isaac beget another son. He wanted to be sure of being the only heir. However, his hatred against Jacob was so great that he determined to hasten the death of his father and then dispatch Jacob. Such murderous plans Esau cherished in his heart, though he denied that he was harboring them.
But God spoke, "Probably thou knowest not that I examine the hearts of men, for I am the Lord that searcheth the heart." And not God alone knew the secret desires of Esau. Rebekah, like all the Mothers, was a prophetess, and she delayed not to warn Jacob of the danger that hung over him. "Thy brother," she said to him, "is as sure of accomplishing his wicked purpose as though thou wert dead.
Now therefore, my son, obey my voice, and arise, flee thou to Laban my brother, to Haran, and tarry with him for seven years, until thy brother's fury turn away." In the goodness of her heart, Rebekah could not but believe that the anger of Esau was only a fleeting passion, and would disappear in the course of time. But she was mistaken, his hate persisted until the end of his life.