Joshua 20:3

so that a person who kills someone unintentionally or accidentally may flee there. These will be your refuge 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 is to kill the murderer; when he finds him, he is to kill him.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.