Why the Angel Kept Freeing Esau's Game in the Field

(Genesis 27:4–5:) "And make me delicacies," etc.; "And Rebekah was listening," etc.; [And Esau went to the field]. Since he would catch and bind them, and the angel would go and release them and drive them off, again he would catch them, and the angel would release them. And why so? Only in order to roll along the hours until Jacob should go, so that he might go and prepare and come in to his father and eat and receive the blessings. Therefore (Genesis 27:5): "And Esau went to the field to hunt game to bring."