3 that the slayer who kills a person accidentally or unintentionally may flee there; and they shall be your 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.