Romans 9:8 in the King James Version
That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed.
Context
7 Neither, because they are Abraham’s offspring, are they all children. But, “your offspring will be accounted as from Isaac.”
8 That is, it is not the children of the flesh who are children of God, but the children of the promise are counted as heirs.
9 For this is a word of promise: “At the appointed time I will come, and Sarah will have a son.”