Galatians 3:26 NIV

1 John 3:1-2 NIV
See what great love the Father has lavished on us, that we should be called children of God! And that is what we are! The reason the world does not know us is that it did not know him. Dear friends, now we are children of God, and what we will be has not yet been made known. But we know that when Christ appears, we shall be like him, for we shall see him as he is.

2 Corinthians 6:18 NIV
And, “I will be a Father to you, and you will be my sons and daughters, says the Lord Almighty.”

Ephesians 1:5 NIV
he predestined us for adoption to sonship through Jesus Christ, in accordance with his pleasure and will—

John 1:12-13 NIV
Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God — children born not of natural descent, nor of human decision or a husband’s will, but born of God.