And not only this; but when Rebecca also had conceived by one, even by our father Isaac; And not only this - A Jew might object: "Ishmael was rejected, not by the sovereign will of God, but because he was the son of the handmaid, or bond-woman, and therefore unworthy to be the peculiar seed; but observe, this was not the only limitation of the seed of Abraham with regard to inheriting the promise, for when Rebecca was with child by that one person of Abraham's issue to whom the promise was made, namely, our father Isaac, she went to inquire of the Lord, Genesis 25:22, Genesis 25:23 : And the Lord said unto her, Two nations are in thy womb, and two manner of People shall be separated from thy bowels; and the one People shall be stronger than the other People; and the elder shall serve the younger. That is, the posterity of the younger shall be a nation much more prosperous and happy than the posterity of the elder.
Related Commentaries of Romans 9:10
Romans 9:10
10 And not only this; but when Rebecca also had conceived by one, even by our father Isaac;