But Isaac said to him, “Who are you?” He answered, “I am your son—your first son—Esau.”
Jacob went to his father and said, “Father.” His father answered, “Yes, son. Who are you?”
But Jacob said, “First, promise me that you will give them to me.” So Esau made an oath to him and sold his rights as the firstborn son to Jacob.
Then Jacob gave Esau bread and lentil soup. Esau ate the food, had something to drink, and then left. So Esau showed that he did not care about his rights as the firstborn son.