Galatians 4:26-27

26But Abraham's wife, Sarah, is a picture of the new Jerusalem that is above. Sarah was a free person, not a slave, and she is like our mother.

27It says in the Bible: ‘Be happy, you woman who could not have any children! You have never known the pain of a child's birth. But now shout loudly because you are so happy! Yes, be happy, because the lonely woman now has more children than the woman who has a husband.’