Genesis 25:31-33

Complete Jewish Bible

³¹ Ya‘akov answered, “First sell me your rights as the firstborn.” ³² “Look, I’m about to die!” said ‘Esav. “What use to me are my rights as the firstborn?” ³³ Ya‘akov said, “First, swear to me!” So he swore to him, thus selling his birthright to Ya‘akov.