Galates 4:23
But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
Galates 3:29
And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.
Actes 3:25
Ye are the children of the prophets, and of the covenant which God made with our fathers, saying unto Abraham, And in thy seed shall all the kindreds of the earth be blessed.
Romains 4:13-18
13
For the promise, that he should be the heir of the world, was not to Abraham, or to his seed, through the law, but through the righteousness of faith.
14
For if they which are of the law be heirs, faith is made void, and the promise made of none effect:
15
Because the law worketh wrath: for where no law is, there is no transgression.
16
Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,
17
As it is written, I have made thee a father of many nations,) before him whom he believed, even God, who quickeneth the dead, and calleth those things which be not as though they were.
18
Who against hope believed in hope, that he might become the father of many nations, according to that which was spoken, So shall thy seed be.
Romains 9:8
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.
Romains 9:9
For this is the word of promise, At this time will I come, and Sara shall have a son.