And when forty years were completed, there appeared to him, in the wilderness of Mount Sinai, an angel of the Lord in a flame of fire in a bush.

These things are allegorized: for these women are the two covenants; the one from the Mount Sinai that brings forth for bondage, which is Hagar.

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