Treasury of Scripture Knowledge

Summary

For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.

Bible References

That

Genesis 16:2
So Sarai said to Abram, “Now behold, the Lord has prevented me from bearing children. Please go in to my maid; perhaps I will obtain children through her.” And Abram listened to the voice of Sarai.
Genesis 21:1
Then the Lord took note of Sarah as He had said, and the Lord did for Sarah as He had promised.