Numbers 35:10-15

Thomson(i) 10 Speak to the children of Israel, and thou shalt say to them, You are about to cross the Jordan into the land of Chanaan, 11 and you will set apart for yourselves cities, which shall be your places of refuge, to which the manslayer may flee. When any person killeth another unwittingly, 12 those cities will be places of refuge from the avenger of blood, that the manslayer may not die, until he stand before the congregation for trial. 13 Therefore, with regard to the cities which you shall give, six shall be your places of refuge; 14 three of these cities you shall give on this side of the Jordan, and three such cities you shall give in the land of Chanaan. 15 They shall be a refuge for the children of Israel, and for the proselyte, and the sojourner among you. These cities are to be places of refuge, to which every one may flee who hath smitten a person unawares.