John 1:12

But to all who received him, to those who believed in his name, he gave the right to become children of God

Romans 9:25-26

As indeed he says in Hosea: "I will call them who were not my people 'my people,' and her who was not beloved I will call 'my beloved.'"

1 Peter 2:10

Once you were not a people, but now you are the people of God; once you had not received mercy, but now you have received 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 all who received him, to those who believed in his name, he gave the right to become children of God
Romans 9:25
As indeed he says in Hosea: "I will call them who were not my people 'my people,' and her who was not beloved I will call 'my beloved.'"
1 Peter 2:10
Once you were not a people, but now you are the people of God; once you had not received mercy, but now you have received mercy.