Or if he strikes him with a hand weapon of wood, by which he may die, and he dies, he is a murderer: the murderer shall surely be put to death.
All Commentaries on Numbers 35:18 Go To Numbers 35
George Leo Haydock
If Hebrew, "or he smite him with a wooden weapon, (wherewith he may die,) and he die, he is a murderer; the murderer shall surely be put to death. "The two former verses are expressed in the same awful manner, intimating that the weapon must be of such a nature that it might easily give a mortal wound, and also that the effect really followed. In these cases, if the person could not clear himself, no refuge or reprieve was allowed. (Haydock)
But the deceased must have been killed upon the spot, otherwise the person who struck him could only be required to pay a fine, Exodus xxi. 19. (Menochius)