Deuteronomy 23:16
“He shall dwell with thee, even among you, in that place which he shall choose in one of thy gates, where it liketh him best: thou shalt not oppress him.”
For the Lord thy God walketh in the midst of thy camp, to deliver thee, and to give up thine enemies before thee; therefore shall thy camp be holy: that he see no unclean thing in thee, and turn away from thee.
Thou shalt not deliver unto his master the servant which is escaped from his master unto thee:
He shall dwell with thee, even among you, in that place which he shall choose in one of thy gates, where it liketh him best: thou shalt not oppress him.
There shall be no whore of the daughters of Israel, nor a sodomite of the sons of Israel.
Thou shalt not bring the hire of a whore, or the price of a dog, into the house of the Lord thy God for any vow: for even both these are abomination unto the Lord thy God.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Thou shalt neither vex a stranger, nor oppress him: for ye were strangers in the land of Egypt.”
“And he went and joined himself to a citizen of that country; and he sent him into his fields to feed swine.”
“To speak evil of no man, to be no brawlers, but gentle, shewing all meekness unto all men.”
“If ye oppress not the stranger, the fatherless, and the widow, and shed not innocent blood in this place, neither walk after other gods to your hurt:”
“Also thou shalt not oppress a stranger: for ye know the heart of a stranger, seeing ye were strangers in the land of Egypt.”