For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
And Hagar bare Abram a son: and Abram called his son's name, which Hagar bare, Ishmael.
Wherefore she said unto Abraham, Cast out this bondwoman and her son: for the son of this bondwoman shall not be heir with my son, even with Isaac.
But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman.
So then, brethren, we are not children of the bondwoman, but of the free.