Romans 8:15; Galatians 4:6-7

Romans 8:15

15 For you have not received a spirit of slavery leading to fear again, but you have received a spirit of adoption as sons by which we cry out, "Abba! Father!"

Galatians 4:6-7

6 Because you are sons, God has sent forth the Spirit of His Son into our hearts, crying, "Abba! Father!"

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