Galatians 4:24-31 New Revised Standard Version (NRSV)
24 Now this is an allegory: these women are two covenants. One woman, in fact, is Hagar, from Mount Sinai, bearing children for slavery. 25 Now Hagar is Mount Sinai in Arabia[a] and corresponds to the present Jerusalem, for she is in slavery with her children. 26 But the other woman corresponds to the Jerusalem above; she is free, and she is our mother. 27 For it is written,
“Rejoice, you childless one, you who bear no children,
28 Now you,[b] my friends,[c] are children of the promise, like Isaac. 29 But just as at that time the child who was born according to the flesh persecuted the child who was born according to the Spirit, so it is now also. 30 But what does the scripture say? “Drive out the slave and her child; for the child of the slave will not share the inheritance with the child of the free woman.” 31 So then, friends,[d] we are children, not of the slave but of the free woman.