Numbers 35:20-23

20These are other examples of murder: A man might push another person hard because he hates him. A man might throw something at another person to hurt him.

21Or a man might hit someone with his hand because he hates him. If the person dies as a result, you must kill the murderer. The dead person's relative must kill the murderer when he meets him.

22But when a man kills another person, it might be a mistake. For example, he might push someone very hard, or he might throw something at another person. If he did not hate the other person, then it might be a mistake.

23Or he might drop a heavy stone on someone when he had not seen them. If he did not hate the other person, perhaps he did not mean to hurt him.