Genesis 25:27-34 NIV

[27] The boys grew up, and Esau became a skillful hunter, a man of the open country, while Jacob was content to stay at home among the tents. [28] Isaac, who had a taste for wild game, loved Esau, but Rebekah loved Jacob. [29] Once when Jacob was cooking some stew, Esau came in from the open country, famished. [30] He said to Jacob, “Quick, let me have some of that red stew! I’m famished!” (That is why he was also called Edom.) [31] Jacob replied, “First sell me your birthright.” [32] “Look, I am about to die,” Esau said. “What good is the birthright to me?” [33] But Jacob said, “Swear to me first.” So he swore an oath to him, selling his birthright to Jacob. [34] Then Jacob gave Esau some bread and some lentil stew. He ate and drank, and then got up and left. So Esau despised his birthright.