Berean Study Bible
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.

King James 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.

American Standard Version
That is, it is not the children of the flesh that are children of God; but the children of the promise are reckoned for a seed.

Darby Bible Translation
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.

Douay-Rheims Bible
That is to say, not they that are the children of the flesh, are the children of God; but they, that are the children of the promise, are accounted for the seed.

English Revised Version
That is, it is not the children of the flesh that are children of God; but the children of the promise are reckoned for a seed.

Young's Literal Translation
that is, the children of the flesh -- these are not children of God; but the children of the promise are reckoned for seed;