John 1:12

But as many as received him, to them gave he power to become sons of God, to them that believe on his name,

Romans 9:25-26

as he says also in Hosea, I will call them that were not my people, my people, and her that was not beloved, beloved,

1 Peter 2:10

who formerly were not a people, but now are a people of God, who had not obtained mercy, but now have 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 as many as received him, to them gave he power to become sons of God, to them that believe on his name,
Romans 9:25
as he says also in Hosea, I will call them that were not my people, my people, and her that was not beloved, beloved,
1 Peter 2:10
who formerly were not a people, but now are a people of God, who had not obtained mercy, but now have obtained mercy.