Genesis 25:27-31

And the boys grew: and Esau was a cunning hunter, a man of the field; and Jacob was a plain man, dwelling in tents.

And Isaac loved Esau, because he did eat of his venison: but Rebekah loved Jacob.

And Jacob sod pottage: and Esau came from the field, and he was faint:

And Esau said to Jacob, Feed me, I pray thee, with that same red pottage; for I am faint: therefore was his name called Edom.

And Jacob said, Sell me this day thy birthright.