John 1:12

but to as many as received him, and believed on him, he granted the privilege of being the sons of God.

Romans 9:25-26

as he saith himself in Osee, "I will call them my people, which were not my people; and her, beloved, which was not beloved.

1 Peter 2:10

of darkness into his marvellous light: you, who formerly were not a people, but are now the people of God, who had not obtained mercy,

Treasury of Scripture Knowledge

Summary

For thou hast confirmed to thyself thy people Israel to be a people unto thee for ever: and thou, LORD, art become their God.

Bible References

Art become

John 1:12
but to as many as received him, and believed on him, he granted the privilege of being the sons of God.
Romans 9:25
as he saith himself in Osee, "I will call them my people, which were not my people; and her, beloved, which was not beloved.
1 Peter 2:10
of darkness into his marvellous light: you, who formerly were not a people, but are now the people of God, who had not obtained mercy,