Genesis 25:28-32

Now Isaac loved Esau because he had a taste for game; but Rebekah loved Jacob.

When Jacob had cooked a stew one day, Esau came in from the field and he was exhausted;

and Esau said to Jacob, “Please let me have a mouthful of that red stuff there, for I am exhausted.” Therefore he was called Edom by name.

But Jacob said, “First sell me your birthright.”

Esau said, “Look, I am about to die; so of what use then is the birthright to me?”