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

Read Numbers 35:17 Using Other Translations

And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.
And if he struck him down with a stone tool that could cause death, and he died, he is a murderer. The murderer shall be put to death.
Or if someone with a stone in his hand strikes and kills another person, it is murder, and the murderer must be put to death.