When forty years had passed, an angel appeared to him in the desert of Mount Sinai, in the flame of a burning bush.

This is the one who in the congregation in the desert went between the angel, who spoke to him on Mount Sinai, and our forefathers, who also received, to be handed down to you, utterances that still live.

This is spoken as an allegory. For these women are two covenants, one coming from Mount Sinai, bearing children that are to be slaves;

that is, Hagar (and Hagar means Mount Sinai, in Arabia) and corresponds to the present Jerusalem, for Jerusalem is in slavery with her children.