18 Or if anyone is holding a wooden object and strikes someone a fatal blow with it, that person is a murderer; the murderer is to be put to death.

Read Numbers 35:18 Using Other Translations

Or 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.
Or if he struck him down with a wooden tool that could cause death, and he died, he is a murderer. The murderer shall be put to death.
Or if someone strikes and kills another person with a wooden object, it is murder, and the murderer must be put to death.