But you, brothers and sisters, are children of the promise like Isaac.

Therefore, brothers and sisters, we are not children of the slave woman but of the free woman.

Now Hagar represents Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.

For it is written: “Rejoice, O barren woman who does not bear children; break forth and shout, you who have no birth pains, because the children of the desolate woman are more numerous than those of the woman who has a husband.”