Galatians 4:26

but the Jerusalem above is free, which is the mother of us all.

Surrounding context

4:25 for this Hagar is Mount Sinai in Arabia, and corresponds to Jerusalem which now is, and is in bondage with her children--

4:26 but the Jerusalem above is free, which is the mother of us all.

4:27 For it is written: "Rejoice, O barren, You who do not bear! Break forth and shout, You who are not in labor! For the desolate has many more children Than she who has a husband."

Translation and sources