'My People' in the Bible

“Many nations will join themselves to the Lord in that day and will become My people. Then I will dwell in your midst, and you will know that the Lord of hosts has sent Me to you.

Thus says the Lord of hosts, ‘Behold, I am going to save My people from the land of the east and from the land of the west;

and I will bring them back and they will live in the midst of Jerusalem; and they shall be My people, and I will be their God in truth and righteousness.’

“And I will bring the third part through the fire,Refine them as silver is refined,And test them as gold is tested.They will call on My name,And I will answer them;I will say, ‘They are My people,’And they will say, ‘The Lord is my God.’”