Galatians 4:5-7

so that He might redeem and liberate those who were under the Law, that we [who believe] might be adopted as sons [as God’s children with all rights as fully grown members of a family]. [Rom 11:17-24] And because you [really] are [His] sons, God has sent the Spirit of His Son into our hearts, crying out, “Abba! Father!” Therefore you are no longer a slave (bond-servant), but a son; and if a son, then also an heir through [the gracious act of] God [through Christ].