5 Bible Verses about Concubines

Surely it is written in the Law that Abraham had two sons, one by the slave-woman and one by the free-woman; but while the son of the slave-woman was born by the flesh, the son of the free-woman was born by the promise.

but just as in the old days the son born by the flesh persecuted the son born by the Spirit, so it is still to-day.

they are not all children of Abraham because they are descended from Abraham. No, it is through Isaac that your offspring shall be reckoned ??8 meaning that instead of God's children being the children born to him by natural descent, it is the children of the Promise who are reckoned as his true offspring.

However, what does the scripture say? Put away the slave-woman and her son, for the son of the slave-woman shall not be heir along with the son of the free-woman.

and had been told that it is through Isaac that your offspring shall be reckoned ??19 for he considered that God was able even to raise men from the dead. Hence he did get him back, by what was a parable of the resurrection.