'Adoption' in the Bible

For you have not received a spirit of slavery leading again to fear [of God’s judgment], but you have received the Spirit of adoption as sons [the Spirit producing sonship] by which we [joyfully] cry, “Abba! Father!”

And not only this, but we too, who have the first fruits of the Spirit [a joyful indication of the blessings to come], even we groan inwardly, as we wait eagerly for [the sign of] our adoption as sons—the redemption and transformation of our body [at the resurrection].

who are Israelites, to whom belongs the adoption as sons, the glory (Shekinah), the [special] covenants [with Abraham, Moses, and David], the giving of the Law, the [system of temple] worship, and the [original] promises.