Leviticus 25:44

" 'As for your slave and your slave woman who are yours, from the nations that [are] all around you, from them you may buy a slave or a slave woman.

Exodus 12:44

But any slave of a man, an acquisition by money, and you have circumcised him, then he may eat it.

Psalm 2:8-9

Ask from me and I will make [the] nations your heritage, and your possession [the] ends of [the] earth.

Isaiah 14:1-2

But Yahweh will have compassion on Jacob, and he will again choose Israel and set them on their land, and the immigrant will join himself to them, and they will attach themselves to the house of Jacob.

Revelation 2:26-27

And the one who conquers and who keeps my works until the end, I will give him authority over the nations,

Treasury of Scripture Knowledge

Summary

Both thy bondmen, and thy bondmaids, which thou shalt have, shall be of the heathen that are round about you; of them shall ye buy bondmen and bondmaids.

Bible References

General references

Exodus 12:44
But any slave of a man, an acquisition by money, and you have circumcised him, then he may eat it.
Psalm 2:8
Ask from me and I will make [the] nations your heritage, and your possession [the] ends of [the] earth.
Isaiah 14:1
But Yahweh will have compassion on Jacob, and he will again choose Israel and set them on their land, and the immigrant will join himself to them, and they will attach themselves to the house of Jacob.
Revelation 2:26
And the one who conquers and who keeps my works until the end, I will give him authority over the nations,