Numbers 35:20

17 If he struck him with a stone in the hand, whereby a man may die, and he died, he is a murderer: the murderer shall surely be put to death.

18 Or if he struck him with a weapon of wood in the hand, whereby a man may die, and he died, he is a murderer: the murderer shall surely be put to death.

19 The avenger of blood shall himself put the murderer to death: when he meets him, he shall put him to death.

20 If he thrust him of hatred, or hurled at him, lying in wait, so that he died,

21 or in enmity struck him with his hand, so that he died; he who struck him shall surely be put to death; he is a murderer: the avenger of blood shall put the murderer to death, when he meets him.

22 But if he thrust him suddenly without enmity, or hurled on him anything without lying in wait,

23 or with any stone, whereby a man may die, not seeing him, and cast it on him, so that he died, and he was not his enemy, neither sought his harm;