But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
Through faith also Sara 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.
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 freewoman.