Galatians 4:22-24

New Revised Standard Version, Anglicised

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