Numbers 35:15
“These six cities shall be a refuge, both for the children of Israel, and for the stranger, and for the sojourner among them: that every one that killeth any person unawares may flee thither.”
And of these cities which ye shall give six cities shall ye have for refuge.
Ye shall give three cities on this side Jordan, and three cities shall ye give in the land of Canaan, which shall be cities of refuge.
These six cities shall be a refuge, both for the children of Israel, and for the stranger, and for the sojourner among them: that every one that killeth any person unawares may flee thither.
And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death.
And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“These were the cities appointed for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person at unawares might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.”
“For we must needs die, and are as water spilt on the ground, which cannot be gathered up again; neither doth God respect any person: yet doth he devise means, that his banished be not expelled from him.”
“Is he the God of the Jews only? is he not also of the Gentiles? Yes, of the Gentiles also:”
“Ye shall have one manner of law, as well for the stranger, as for one of your own country: for I am the Lord your God.”
“There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.”