Joshua 20:9
“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.”
And they appointed Kedesh in Galilee in mount Naphtali, and Shechem in mount Ephraim, and Kirjath–arba, which is Hebron, in the mountain of Judah.
And on the other side Jordan by Jericho eastward, they assigned Bezer in the wilderness upon the plain out of the tribe of Reuben, and Ramoth in Gilead out of the tribe of Gad, and Golan in Bashan out of the tribe of Manasseh.
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.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“That the slayer that killeth any person unawares and unwittingly may flee thither: and they shall be your refuge from the avenger of blood.”
“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 they shall be unto you cities for refuge from the avenger; that the manslayer die not, until he stand before the congregation in judgment.”
“And he shall dwell in that city, until he stand before the congregation for judgment, and until the death of the high priest that shall be in those days: then shall the slayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.”
“And when he that doth flee unto one of those cities shall stand at the entering of the gate of the city, and shall declare his cause in the ears of the elders of that city, they shall take him into the city unto them, and give him a place, that he may dwell among them.”