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 to Abram, "Look, please, Yahweh has prevented me from bearing children. Please go in to my servant; perhaps {I will have children by her}." And Abram listened to the voice of Sarai.
Genesis 21:1
And Yahweh visited Sarah as he had said. And Yahweh did to Sarah as he had promised.