Romans 9:8
So it is not the children of the flesh who are God’s children, but it is the children of the promise who are regarded as offspring.
Berean Standard Bible
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.
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.