Joshua 20:3
So that any man who in error and without design has taken the life of another, may go in flight to them: and they will be safe places for you from him who has the right of punishment for 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
He whose right it is to give punishment for blood, may himself put to death the taker of life when he comes face to face with him.