'My People' in the Bible

"Many nations will join themselves to Yahweh on that day, and they will be my people, and I will dwell in your midst. And you will know that Yahweh of hosts has sent me to you.

Thus says Yahweh of hosts: 'Look! 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 and they will dwell in the midst of Jerusalem. They will be my people and I will be their God in faithfulness and in righteousness.'

And I will bring the [remaining] third into the fire, and I will refine them like [one] refines silver, and I will test them like [one] tests gold. They will call my name, and I will answer them. I will say, 'They are my people,' and they will say, 'Yahweh [is] my God.'"