The Scriptures {\cf2\super [53]} say that Abraham {\cf2\super [54]} had two sons. The mother of one son was a slave woman. The mother of the other son was a free woman.
Sarah said to Abraham, “Get rid of that slave woman and her son. Send them away! When we die, our son Isaac will get everything we have. I don’t want that slave woman’s son sharing those things with my son Isaac!”
Abraham’s son from the slave woman was born in the normal human way. But the son from the free woman was born because of the promise \{God made to Abraham\}.
But what do the Scriptures {\cf2\super [60]} say? “Throw out the slave woman and her son! The son of the free woman will receive everything his father has. But the son of the slave woman will receive nothing.” {\cf2\super [61]}