Joshua 20:3
Anyone who accidentally kills someone can escape there; these cities will be a place of asylum from the avenger of blood.
Treasury of Scripture Knowledge
Summary
That the slayer that killeth any person unawares and unwittingly may flee thither: and they shall be your refuge from the avenger of blood.
General references
Bible References
General references
Numbers 35:19
The avenger of blood himself must kill the murderer; when he meets him, he must kill him.