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
And Sarai said unto Abram, Behold now, Jehovah hath restrained me from bearing; go in, I pray thee, unto my handmaid; it may be that I shall obtain children by her. And Abram hearkened to the voice of Sarai.
Genesis 21:1
And Jehovah visited Sarah as he had said, and Jehovah did unto Sarah as he had spoken.

American Standard Version Public Domain