Romans 9:8-10

Darby Translation

⁸ That is, [they that are] the children of the flesh, these [are] not the children of God; but the children of the promise are reckoned as seed.

⁹ For this word [is] of promise, According to this time I will come, and there shall be a son to Sarah.

¹⁰ And not only [that], but Rebecca having conceived by one, Isaac our father,