Numbers 35:12

Until he stand before the congregation in judgment - So one of these cities was not a perpetual asylum; It was only a pro tempore refuge, till the case could be fairly examined by the magistrates in the presence of the people, or the elders their representatives; and this was done in the city or place where he had done the murder, Joshua 20:4 , Joshua 20:6 . If he was found worthy of death, they delivered him to the avenger that he might be slain, Deuteronomy 19:12 ; if not, they sent him back to the city of refuge, where he remained till the death of the high priest, Numbers 35:25 . Before the cities of refuge were appointed, the altar appears to have been a sanctuary for those who had killed a person unwittingly; see on Exodus 21:13 ; (note), and Exodus 21:14 ; (note).