'Adoption' in the Bible

For ye received not the spirit of bondage again unto fear; but ye received the spirit of adoption, whereby we cry, Abba, Father.

And not only so, but ourselves also, who have the first-fruits of the Spirit, even we ourselves groan within ourselves, waiting for our adoption, to wit , the redemption of our body.

who are Israelites; whose is the adoption, and the glory, and the covenants, and the giving of the law, and the service of God , and the promises;

that he might redeem them that were under the law, that we might receive the adoption of sons.

having foreordained us unto adoption as sons through Jesus Christ unto himself, according to the good pleasure of his will,