Galatians 4:24-27

24Now this may be interpreted allegorically: these women are two acovenants. bOne is from Mount Sinai, bearing children for slavery; she is Hagar. 25Now Hagar is Mount Sinai in Arabia;
Some manuscripts For Sinai is a mountain in Arabia
she corresponds to the present Jerusalem, for she is in slavery with her children.
26But dthe Jerusalem above is free, and she is our mother. 27For it is written,

eRejoice, O barren one who does not bear;
break forth and cry aloud, you who are not in labor!
For the children of the desolate one will be more
than those of the one who has a husband.”
Copyright information for ESV