Genesis 25:31-34

25:31 But Jacob replied, “First sell me your birthright.” 25:32 “Look,” said Esau, “I’m about to die! What use is the birthright to me?” 25:33 But Jacob said, “Swear an oath to me now.” So Esau swore an oath to him and sold his birthright to Jacob.

25:34 Then Jacob gave Esau some bread and lentil stew; Esau ate and drank, then got up and went out. So Esau despised his birthright.