Galatians 4:3-7

So also we, when we were minors, were enslaved under the basic forces of the world.  But when the appropriate time had come, God sent out his Son, born of a woman, born under the law,  to redeem those who were under the law, so that we may be adopted as sons with full rights.  And because you are sons, God sent the Spirit of his Son into our hearts, who calls “Abba! Father!”  So you are no longer a slave but a son, and if you are a son, then you are also an heir through God.

Luke 15:21-23 describes the return of the lost son in Jesus’ parable: “The son said to him, ‘Father, I have sinned against heaven and against you. I am no longer worthy to be called your son.’ But the father said to his servants, ‘Quick! Bring the best robe and put it on him. Put a ring on his finger and sandals on his feet. Bring the fattened calf and kill it. Let’s have a feast and celebrate.’” The robe and the ring signify a restoration to sonship. Likewise, we are called heavenward as sons and daughters of the Most High, and the gift of the Holy Spirit is our seal of that truth in Christ. Romans 8:17 says, “Now if we are children, then we are heirs—heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory.”