Leviticus 25:44

Both your male and female slaves, whom you shall have, shall be of the nations that are round about you; of them shall you buy male and female slaves.

Exodus 12:44

But every man's servant that is bought for money, when you have circumcised him, then shall he eat thereof.

Psalm 2:8-9

Ask of me, and I shall give you the nations for your inheritance, and the uttermost parts of the earth for your possession.

Isaiah 14:1-2

For the LORD will have mercy on Jacob, and will yet choose Israel, and set them in their own land: and the strangers shall be joined with them, and they shall cling to the house of Jacob.

Revelation 2:26-27

And he that overcomes, and keeps my works unto the end, to him will I give power 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 every man's servant that is bought for money, when you have circumcised him, then shall he eat thereof.
Psalm 2:8
Ask of me, and I shall give you the nations for your inheritance, and the uttermost parts of the earth for your possession.
Isaiah 14:1
For the LORD will have mercy on Jacob, and will yet choose Israel, and set them in their own land: and the strangers shall be joined with them, and they shall cling to the house of Jacob.
Revelation 2:26
And he that overcomes, and keeps my works unto the end, to him will I give power over the nations: