Romans 9:8-10

Revised Standard Version Catholic Edition

⁸ This means that it is not the children of the flesh who are the children of God, but the children of the promise are reckoned as descendants. ⁹ For this is what the promise said, “About this time I will return and Sarah shall have a son.” ¹⁰ And not only so, but also when Rebecca had conceived children by one man, our forefather Isaac,