Galatians 4:22; Galatians 4:27

22 For it is written that Abraham had two sons, one by the slave woman and the other by the free woman.

27 For it is written: “Be glad, barren woman, you who never bore a child; shout for joy and cry aloud, you who were never in labor; because more are the children of the desolate woman than of her who has a husband.”