But he who was of the bondwoman was born after the flesh; but he of the free woman was by promise.
But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;
For it is written, that Abraham had two sons, the one by a bondmaid, the other by a free woman.
Through faith also Sarah herself received strength to conceive seed, and was delivered of a child when she was past age, because she judged him faithful who had promised.