Romans 9:8-10

New Matthew Bible

⁸ That is to say, the children of the flesh are not the children of God, but the children of promise are counted the seed. ⁹ For this is a word of promise: About this time I will come, and Sarah shall have a son. ¹⁰ Neither was it so with her only, but also when Rebecca was pregnant with twins by one – I mean, by our father Isaac.