Genesis 25:33 in the King James Version
And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob.
Context
32 Esau said, “Behold, I am about to die. What good is the birthright to me?”
33 Jacob said, “Swear to me first.” He swore to him. He sold his birthright to Jacob.
34 Jacob gave Esau bread and lentil stew. He ate and drank, rose up, and went his way. So Esau despised his birthright.