Genesis 25:27-32

When the boys grew up, Esau became a skillful hunter, a man of the field, but Jacob was a peaceful man, living in tents. Now Isaac loved Esau, because he had a taste for game, but Rebekah loved Jacob. When Jacob had cooked stew, Esau came in from the field and he was famished; and Esau said to Jacob, “Please let me have a swallow of that red stuff there, for I am famished.” Therefore his name was called Edom. But Jacob said, “First sell me your birthright.” Esau said, “Behold, I am about to die; so of what use then is the birthright to me?”