Westminster Q74: What is adoption?

A74: Adoption is an act of the free grace of God,[1] in and for his only Son Jesus Christ,[2] whereby all those that are justified are received into the number of his children,[3] have his name put upon them,[4] the Spirit of his Son given to them,[5] are under his fatherly care and dispensations,[6] admitted to all the liberties and privileges of the sons of God, made heirs of all the promises, and fellow heirs with Christ in glory.[7]

(1Jn 3:1) See how great a love the Father has bestowed on us, that we would be called children of God; and such we are. For this reason the world does not know us, because it did not know Him.
(Eph 1:5) He predestined us to adoption as sons through Jesus Christ to Himself, according to the kind intention of His will,

(Gal 4:4-5) But when the fullness of the time came, God sent forth His Son, born of a woman, born under the Law, so that He might redeem those who were under the Law, that we might receive the adoption as sons.
(Joh 1:12) But as many as received Him, to them He gave the right to become children of God, even to those who believe in His name,
(2Co 6:18) "And I will be a father to you, And you shall be sons and daughters to Me," Says the Lord Almighty.

(Rev 3:12) 'He who overcomes, I will make him a pillar in the temple of My God, and he will not go out from it anymore; and I will write on him the name of My God, and the name of the city of My God, the new Jerusalem, which comes down out of heaven from My God, and My new name.
(Gal 4:6) Because you are sons, God has sent forth the Spirit of His Son into our hearts, crying, "Abba! Father!"
(Psa 103:13) Just as a father has compassion on his children, So the LORD has compassion on those who fear Him.

(Pro 14:26) In the fear of the LORD there is strong confidence, And his children will have refuge.

(Mat 6:32) "For the Gentiles eagerly seek all these things; for your heavenly Father knows that you need all these things.
(Heb 6:12) so that you will not be sluggish, but imitators of those who through faith and patience inherit the promises.

(Rom 8:17) and if children, heirs also, heirs of God and fellow heirs with Christ, if indeed we suffer with Him so that we may also be glorified with Him.