Galatians 4:23
And he of the bond-woman was born after the flesh, but he of the free-woman by promise.
Hebrews 11:11
By faith Sarah also herself received power to conceive seed, even when she was past age, because she accounted him faithful who had promised.
Romans 9:7-8
Neither because they are the seed of Abraham, are they all children, but in Isaac shall thy seed be called:
Romans 4:18-21
Who against hope believed in hope, that he should be the father of many nations, according to that which was spoken, So shall thy seed be.
Romans 10:8
(that is, to bring Christ again from the dead) But what saith he? The word is nigh thee, even in thy mouth, and in thy heart; that is, the word of faith which we preach:
Galatians 4:28-29
Now we, brethren, like Isaac, are children of promise.