Numbers 35:18-22

Or if he struck him with a wooden object in the hand, by which he would die, and as a result he did die, he is a murderer; the murderer must be put to death.

The blood avenger himself shall put the murderer to death; he himself shall put him to death when he meets him.

Now if he pushed him in hatred, or he threw something at him with malicious intent, and as a result he died,

or if he struck him with his hand with hostility, and as a result he died, the one who struck him must be put to death; he is a murderer. The blood avenger shall put the murderer to death when he meets him.

‘But if he pushed him suddenly, without hostility, or threw any object at him without malicious intent,