Commentaries
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, Nu 35; De 19. God's spiritual Israel have, and shall have in Christ and heaven, not only rest to repose in, but refuge to secure themselves in. These cities were designed to typify the relief which the gospel provides for penitent sinners, and their protection from the curse of the law and the wrath of God, in our Lord Jesus, to whom believers flee for refuge, Heb 6:18.
6. until the death of the high priest—His death secured the complete deliverance of the manslayer from his sin, only because he had been anointed with the holy oil (Nu 35:25), the symbol of the Holy Ghost; and thus the death of the earthly high priest became a type of that of the heavenly one (Heb 9:14, 15).