Numbers Chapter 35, Verse 21

21: Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him.— edit KJV text
21: Or being his enemy, strike him with his hand, and he die: the striker shall be guilty of murder: the kinsman of him that was slain as soon as he findeth him, shall kill him.— edit Douay text
21: or if he have smitten him with his hand through anger, and the man should die, let the man that smote him be put to death by all means, he is a murderer: let the murderer by all means be put to death: the avenger of blood shall slay the murderer when he meets him.— edit LXX text