Genesis 25:29-34

29And Jacob had cooked a dish; and Esau came from the field, and he was faint. 30And Esau said to Jacob, Feed me, I pray thee, with the red — the red thing there, for I am faint. Therefore was his name called Edom. 31And Jacob said, Sell me now thy birthright. 32And Esau said, Behold, I am going to die, and of what use can the birthright be to me? 33And Jacob said, Swear unto me now. And he swore unto him, and sold his birthright to Jacob. 34And Jacob gave Esau bread and the dish of lentils; and he ate and drank, and rose up and went away. Thus Esau despised the birthright.