Joshua 20:9
These were the cities appointed for all the children of Israel, and to the strangers that Sojourned among them that whosoever killed any person ignorantly, the same might flee thither and should not die by the hand of the avenger of blood, until he stood before the congregation.
Numbers 35:15
And these six free cities shall be for the children of Israel and for the stranger and for him that dwelleth among you, that all they which kill any person unawares, may flee thither.
Joshua 20:4
And the slayer shall flee unto one of those Cities and shall stand in the entering of the gate of the city and shall show his cause in the ears of the elders of the said city. And they shall take him into the city unto them, and shall give him a place that he may dwell among them.
Joshua 20:6
And he shall dwell in the said city until he stand before the congregation in judgment, and until the death of the high priest that shall be in those days. And then shall the slayer return and come unto his own city and unto his own house, and unto the city from whence he fled.'"