Romans 9:7-9

Darby Translation

⁷ nor because they are seed of Abraham [are] all children: but, In Isaac shall a seed be called to thee.

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.