Romans 9:8
That is, the children of the flesh are not the children of God; but the children of the promise are counted for the posterity.
John 1:13
who were begotten, not of blood, 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, as a seal of the righteousness of the faith that he had while he was uncircumcised, in order that he might be the father of all that believe, even in a state of uncircumcision, so that righteousness might be counted to them also;
Romans 8:14
For as many as are led by the Spirit of God, they are the sons of God.
Galatians 3:26-29
for you are all the sons of God, by faith in Christ Jesus:
Galatians 4:22-31
For it is written, that Abraham had two sons; one by a bondmaid, and one by a free woman.
1 John 3:1-2
Behold, how great love the Father has bestowed on us, that we should be called the children of God! For this reason, the world knows us not, because it knew him not.