5 Bible Verses about Concubines

For it is written, that Abraham had two sons, one by a servant woman, and the other by a free woman. But he by the servant woman was born of the flesh, and he by the free woman, by the promise.

But as then he that was born of the flesh persecuted him that was born of the Spirit, so also now.

neither, because they are a posterity of Abraham, are they all children; but in Isaac shall your posterity be called;

But what says the Scripture? Cast out the servant-woman and her son; for the son of the servant woman shall not be an heir, with the son of the free.

of whom it was said, In Isaac shall your posterity be called,