Romans 9:8
That is, it is not Abraham's natural descendants who are God's children, but those who are made children by the promise are counted his true descendants.
John 1:13
who were born of God and not of natural blood nor of physical or human impulse.
Romans 4:11-16
Afterward he received the mark of circumcision as God's seal of his right standing with Him on condition of faith which he had before he was circumcised, that he might be the forefather of all who have faith while still uncircumcised, that they might have their faith credited to them as right standing with God;
Romans 8:14
For all who are guided by God's Spirit are God's sons.
Galatians 3:26-29
For all of you are sons of God through faith in Christ Jesus.
Galatians 4:22-31
For the Scripture says that Abraham had two sons, one by a slave girl, the other by a free woman.
1 John 3:1-2
See what wonderful love the Father has bestowed on us in letting us be called God's children, and that is what we are! This is why the world does not know what we are, because it has never come to know Him.