5 Bible Verses about Concubines

For it is written, that Abraham had two sons; one by a bondmaid, and one by a free woman. But the one by the bondmaid was born according to the flesh; the other, by the free woman, was by promise.

But as then, he that was born according to the flesh persecuted him that was born ac cording to the Spirit, so even now.

Nor, because they are the posterity of Abraham, are they all children: but in Isaac shall your posterity be called.

But what says the scripture? Cast out the bondwoman and her son; for the son of the bondwoman shall not be heir with the son of the free-woman.

of which first-born it was said: In Isaac shall your posterity be called: