Romans 9:8

“You are the sons of Yahweh your God; you shall not gash yourselves nor shave your forehead for the sake of the dead.

and do not suppose that you can say to yourselves, ‘We have Abraham for our father’; for I say to you that from these stones God is able to raise up children to Abraham.

For the promise to Abraham or to his seed that he would be heir of the world was not through the Law, but through the righteousness of faith.

For this reason it is by faith, in order that it may be according to grace, so that the promise will be guaranteed to all the seed, not only to those who are of the Law, but also to those who are of the faith of Abraham, who is the father of us all—

For as many as are being led by the Spirit of God, these are sons of God.

The Spirit Himself testifies with our spirit that we are children of God,

For the anxious longing of the creation eagerly waits for the revealing of the sons of God.

And if you belong to Christ, then you are Abraham’s seed, heirs according to promise.

And you brothers, in accordance with Isaac, are children of promise.