Leviticus 25:43
“Thou shalt not rule over him with rigour; but shalt fear thy God.”
And then shall he depart from thee, both he and his children with him, and shall return unto his own family, and unto the possession of his fathers shall he return.
For they are my servants, which I brought forth out of the land of Egypt: they shall not be sold as bondmen.
Thou shalt not rule over him with rigour; but shalt fear thy God.
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.
Moreover of the children of the strangers that do sojourn among you, of them shall ye buy, and of their families that are with you, which they begat in your land: and they shall be your possession.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“Ye shall not therefore oppress one another; but thou shalt fear thy God: for I am the Lord your God.”
“Take thou no usury of him, or increase: but fear thy God; that thy brother may live with thee.”
“And as a yearly hired servant shall he be with him: and the other shall not rule with rigour over him in thy sight.”
“And ye shall take them as an inheritance for your children after you, to inherit them for a possession; they shall be your bondmen for ever: but over your brethren the children of Israel, ye shall not rule one over another with rigour.”
“Thou shalt rise up before the hoary head, and honour the face of the old man, and fear thy God: I am the Lord.”