Leviticus 25:45
Also you may buy slaves from the children of the foreigners who reside with you, and from their families that are with you, whom they have fathered in your land, they may become your property.
Isaiah 56:3-6
No foreigner who becomes a follower of the Lord should say, 'The Lord will certainly exclude me from his people.' The eunuch should not say, 'Look, I am like a dried-up tree.'"
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