Galatians 4:23 ASV

²¹  Tell me, ye that desire to be under the law, do ye not hear the law?

²²  For it is written, that Abraham had two sons, one by the handmaid, and one by the freewoman.

²³  Howbeit the 'son' by the handmaid is born after the flesh; but the 'son' by the freewoman 'is born' through promise.

²⁴  Which things contain an allegory: for these 'women' are two covenants; one from mount Sinai, bearing children unto bondage, which is Hagar.

²⁵  Now this Hagar is mount Sinai in Arabia and answereth to the Jerusalem that now is: for she is in bondage with her children.