Galatians 4:22-26

22For it is written, that Abraham had two sons, one by the handmaid, and one by the freewoman. 23Howbeit the son by the handmaid is born after the flesh; but the son by the freewoman is born through promise. 24Which things contain an allegory: for these women are two covenants; one from mount Sinai, bearing children unto bondage, which is Hagar. 25Now this Hagar is mount Sinai in Arabia and answereth to the Jerusalem that now is: for she is in bondage with her children. 26But the Jerusalem that is above is free, which is our mother.