And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob.
Jacob bargains with Esau for the birthright over a meal of red pottage.
Genesis 25:33
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
31And Jacob said, Sell me this day thy birthright.
32And Esau said, Behold, I am at the point to die: and what profit shall this birthright do to me?
33And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob.
34Then Jacob gave Esau bread and pottage of lentiles; and he did eat and drink, and rose up, and went his way: thus Esau despised his birthright.