Pharaoh’s daughter adopted Moses, named him and brought him up as her own son.
Exodus 2:10 And the child grew, and she brought him unto Pharaoh’s daughter, and he became her son. And she called his name Moses: and she said, Because I drew him out of the water.
Israel were adopted by God to be his people.
Deuteronomy 7:6 For thou art an holy people unto the LORD thy God: the LORD thy God hath chosen thee to be a special people unto himself, above all people that are upon the face of the earth.
Romans 9:4 Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and the service of God, and the promises;
Mordecai adopted Esther after her parents died.
Esther 2:7 And he brought up Hadassah, that is, Esther, his uncle’s daughter: for she had neither father nor mother, and the maid was fair and beautiful; whom Mordecai, when her father and mother were dead, took for his own daughter.
Those who believe the gospel and are baptised into Jesus Christ become children of God by adoption.
Romans 8:15 For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.
Galatians 4:5 To redeem them that were under the law, that we might receive the adoption of sons.
Ephesians 1:5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
I hope you find this helpful.