Romans 9:8-10

World English Bible

⁸ That is, it is not the children of the flesh who are children of God, but the children of the promise are counted as heirs. ⁹ For this is a word of promise, “At the appointed time I will come, and Sarah will have a son.”Genesis 18:10,14 ¹⁰ Not only so, but Rebekah also conceived by one, by our father Isaac.