3 that the manslayer that killeth any person unwittingly [and] unawares may flee thither: and they shall be unto you for a refuge from the avenger of blood.

Matthew Henry's Commentary on Joshua 20:3

Commentary on Joshua 20:1-6

(Read Joshua 20:1-6)

When the Israelites were settled in their promised inheritance, they were reminded to set apart the cities of refuge, whose use and typical meaning have been explained, Hebrews 6:18.