Genesis 25:26, 33, 34
Genesis 25:26 NIV
After this, his brother came out, with his hand grasping Esau’s heel; so he was named Jacob. Isaac was sixty years old when Rebekah gave birth to them.
Genesis 25:33 NIV
But Jacob said, “Swear to me first.” So he swore an oath to him, selling his birthright to Jacob.
Genesis 25:34 NIV
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.