GOD'S WORD® Translation
Now, the son of the slave woman was conceived in a natural way, but the son of the free woman was conceived through a promise [made to Abraham].

American Standard Version
Howbeit the'son by the handmaid is born after the flesh; but the'son by the freewoman is born through promise.

Berean Study Bible
His son by the slave woman was born according to the flesh, but his son by the free woman was born through the promise.

Douay-Rheims Bible
But he who was of the bondwoman, was born according to the flesh: but he of the free woman, was by promise.

English Revised Version
Howbeit the son by the handmaid is born after the flesh; but the son by the freewoman is born through promise.

King James Bible
But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.

World English Bible
However, the son by the handmaid was born according to the flesh, but the son by the free woman was born through promise.

Young's Literal Translation
but he who is of the maid-servant, according to flesh hath been, and he who is of the free-woman, through the promise;

Galatians 4:23 Additional Translations ...