Galatians 4:24-25

This story teaches something else: The two women are like the two agreements between God and his people. One agreement is the law that God made on Mount Sinai, and the people who are under this agreement are like slaves. The mother named Hagar is like that agreement. She is like Mount Sinai in Arabia and is a picture of the earthly city of Jerusalem. This city and its people are slaves to the law.