Numbers:35:11-12
lesserot@Numbers:35:11 @ Then ye shall appoint unto yourselves proper cities, that they be cities of refuge for you; and thither shall flee the manslayer who killeth any person at unawares.
lesserot@Numbers:35:12 @ And these cities shall be unto you for a refuge from the avenger; that the manslayer die not, until he have stood before the congregation for trial.