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).

three cities

Deuteronomy 4:41-43 Then Moses severed three cities on this side Jordan toward the sun rise...

Deuteronomy 19:8-10 And if the LORD your God enlarge your coast, as he has sworn to your fathers...

Joshua 20:7-9 And they appointed Kedesh in Galilee in mount Naphtali, and Shechem in mount Ephraim, and Kirjatharba, which is Hebron...

Job's Faith and Expectation
I know that my Redeemer liveth, and that He shall stand in the latter day upon the earth. And though after my skin worms destroy this body, yet in my flesh shall I see God. C hristianity, that is, the religion of which MESSIAH is the author and object, the foundation, life, and glory, though not altogether as old as creation, is nearly so. It is coeval [contemporary] with the first promise and intimation of mercy given to fallen man. When Adam, by transgression, had violated the order and law of …
John Newton—Messiah Vol. 2