Romans 9:8
That is, the children of the flesh are not the children of God; but the children of the promise are reckoned for a seed.
John 1:13
who were born, not of bloods, nor of the will of the flesh, nor of the will of man, but of God.
Romans 4:11-16
And he received the sign of circumcision, a seal of the righteousness of the faith which he had while in uncircumcision; that he might be father of all who believe while in uncircumcision, that the righteousness might be reckoned to them;
Romans 8:14
For as many as are led by the Spirit of God, these are sons of God.
Galatians 3:26-29
for ye are all sons of God through faith in Christ Jesus;
Galatians 4:22-31
For it has been written that Abraham had two sons, one by the bond-woman, and one by the free-woman.
1 John 3:1-2
Behold what manner of love the Father hath given to us, that we should be called children of God; and such we are. For this cause the world knows us not, because it knew Him not.