Romans 9:8 WBT

⁶  Not as though the word of God hath taken no effect. For they [are] not all Israel, who are [descendants] from Israel?

⁷  Neither because they are the seed of Abraham, [are they] all children: but, In Isaac shall thy seed be called.

⁸  That is, They who are the children of the flesh, these [are] not the children of God; but the children of the promise are counted for the seed.

⁹  For this [is] the word of promise, At this time will I come, and Sarah shall have a son.

¹⁰  And not only [this]; but when Rebecca also had conceived by one, [even] by our father Isaac,