Numbers 35:18

16And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death.

17And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.

18Or if he smite him with an hand weapon of wood, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.

19The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.

20But if he thrust him of hatred, or hurl at him by laying of wait, that he die;