Galatians 4:23-24

New International Version

²³ His son by the slave woman was born according to the flesh,^(A) but his son by the free woman was born as the result of a divine promise.^(B)

²⁴ These things are being taken figuratively: The women represent two covenants. One covenant is from Mount Sinai and bears children who are to be slaves: This is Hagar.