Genesis 25:23

25:23 and the Lord said to her,

“Two nations are in your womb,

and two peoples will be separated from within you.

One people will be stronger than the other,

and the older will serve the younger.”

Genesis 25:33

25:33 But Jacob said, “Swear an oath to me now.” So Esau swore an oath to him and sold his birthright to Jacob.