Romans 9:8-10

21st Century King James Version

⁸ That is, they who are the children of the flesh, these are not the children of God; rather, the children of the promise are counted as the seed.

⁹ For this is the word of promise: “At this time will I come, and Sarah shall have a son.”

¹⁰ And not only this, but when Rebecca also had conceived by one, even by our father Isaac