Romans 9:26
"And it shall come to pass, that in the place where it was said unto them, Ye are not my people; there shall they be called the children of the living God."
Cross References (ranked by relevance)
I will say to the north, Give up; and to the south, Keep not back: bring my sons from far, and my daughters from the ends of the earth;
The Spirit itself beareth witness with our spirit, that we are the children of God:
For ye are all the children of God by faith in Christ Jesus.
And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.
And not for that nation only, but that also he should gather together in one the children of God that were scattered abroad.
And Simon Peter answered and said, Thou art the Christ, the Son of the living God.