And Esau was forty years old when he took to wife Judith the daughter of Beeri the Hittite, and Bashemath the daughter of Elon the Hittite. Which were a grief of mind unto Isaac and to Rebekah. This passage highlights how Esau’s marriage to Hittite women caused distress to his parents, Isaac and Rebekah, likely because they were from a people who did not follow God's covenant