Apostol § 210ctr

Brethren, Abraham had two sons: the one by a bondmaid, the other by a free woman. But he who was of the bondwoman was bom after the flesh, and he of the free woman was by promise, which things are an allegory. For these are the two covenants: the one from Mount Sinai which gives birth to bondage, which is Hagar—for this Hagar is Mount Sinai in Arabia, and corresponds to Jerusalem which now is, and is in bondage with her children. But Jerusalem which is above is free, which is the mother of us all. For it is written: “Rejoice, thou barren, that bearest not! Break forth and shout, thou that travailest not! For the desolate has many more children than she which has a husband...”