Parallel
Joshua 20:3
Brenton's English Septuagint · Berean Standard Bible
[Even] a refuge to the slayer who has smitten a man unintentionally; and the cities shall be to you a refuge, and the slayer shall not be put to death by the avenger of blood, until he have stood before the congregation for judgment.
so that anyone who kills another unintentionally or accidentally may flee there. These will be your refuge from the avenger of blood.