Genesis 25:27-34

When the boys grew up, Esau became an expert hunter, an outdoorsman, but Jacob was a quiet man who stayed at home. Isaac loved Esau because he had a taste for wild game, but Rebekah loved Jacob. Once when Jacob was cooking a stew, Esau came in from the field exhausted. He said to Jacob, “Let me eat some of that red stuff, because I’m exhausted.” That is why he was also named Edom. Jacob replied, “First sell me your birthright.” “Look,” said Esau, “I’m about to die, so what good is a birthright to me?” Jacob said, “Swear to me first.” So he swore to Jacob and sold his birthright to him. Then Jacob gave bread and lentil stew to Esau; he ate, drank, got up, and went away. So Esau despised his birthright.