For this Agar is mount Sinai in Arabia, and corresponds with Jerusalem that now is, and is in bondage with her children.

For it is written, "Rejoice, thou barren who bearest not, cry out and shout for joy, thou that travailest not, for more are the children of her that was desolate, than of her which had an husband."

But what saith the scripture? "Cast out the bond-woman and her son for the son of the bond-maid shall in no wise inherit with the son of the free woman."