Romans 8:15

15 For you did not receive the spirit of bondage again to fear, but you received the Spirit of adoption by whom we cry out, "Abba, Father."

Galatians 4:5

5 to redeem those who were under the law, that we might receive the adoption as sons.

Galatians 4:7

7 Therefore you are no longer a slave but a son, and if a son, then an heir of God through Christ.

Ephesians 1:5

5 having predestined us to adoption as sons by Jesus Christ to Himself, according to the good pleasure of His will,