Galatians 4:26-28

But the heavenly Jerusalem, which is above, is like the free woman. She is our mother. It is written in the Scriptures: “Be happy, Jerusalem. You are like a woman who never gave birth to children. Start singing and shout for joy. You never felt the pain of giving birth, but you will have more children than the woman who has a husband.” My brothers and sisters, you are God’s children because of his promise, as Isaac was then.