John 1:12

But as many as received Him, to them He gave the right to become children of God, to those believing in His name;

Romans 9:25-26

As He saith in Hosea, "I will call that My people, which was not My people; and her, 'Beloved,' who was not beloved.

1 Peter 2:10

who once were not a people, but are now God's people; 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 He gave the right to become children of God, to those believing in His name;
Romans 9:25
As He saith in Hosea, "I will call that My people, which was not My people; and her, 'Beloved,' who was not beloved.
1 Peter 2:10
who once were not a people, but are now God's people; who had not obtained mercy, but now have obtained mercy.