Galatians 4:23

But he by the servant woman was born of the flesh, and he by the free woman, by the promise.

By faith also Sarah herself received power to become a mother, even beyond the usual age, because she regarded him faithful that promised.

neither, because they are a posterity of Abraham, are they all children; but in Isaac shall your posterity be called;

But what does it say? The word is nigh you, in your mouth and in your mind; that is, the word of the faith which we preach.

But we, brothers, like Isaac, are children of the promise.

Treasury of Scripture Knowledge

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

neither, because they are a posterity of Abraham, are they all children; but in Isaac shall your posterity be called;

But what does it say? The word is nigh you, in your mouth and in your mind; that is, the word of the faith which we preach.

By faith also Sarah herself received power to become a mother, even beyond the usual age, because she regarded him faithful that promised.

But we, brothers, like Isaac, are children of the promise.