Leviticus 25:45

And in addition, you may get, for money, servants from among the children of other nations who are living with you, and from their families which have come to birth in your land; and these will be your property.

Isaiah 56:3-6

And let not the man from a strange country, who has been joined to the Lord, say, The Lord will certainly put a division between me and his people: and let not the unsexed man say, See, I am a dry tree.

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