His father Isaac asked him, “Who are you?” He said, “I am your son, your firstborn son, Esau.”
But Jacob said, “Swear to me first!” So he sold Jacob his right as firstborn under oath.
Jacob then gave him some bread and the lentil stew; and Esau ate, drank, got up, and went his way. So Esau treated his right as firstborn with disdain.
Going to his father, Jacob said, “Father!” “Yes?” replied Isaac. “Which of my sons are you?”