1 Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.
2)
John 1:12
12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
Romans 8:17
17 And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.