Galatians 4:22-24

Revised Standard Version

²² For it is written that Abraham had two sons, one by a slave and one by a free woman. ²³ But the son of the slave was born according to the flesh, the son of the free woman through promise. ²⁴ Now this is an allegory: these women are two covenants. One is from Mount Sinai, bearing children for slavery; she is Hagar.