Numbers 21:5

21:5 And the people spoke against God and against Moses, “Why have you brought us up out of Egypt to die in the wilderness, for there is no bread or water, and we detest this worthless food.”

Numbers 35:30

35:30 “Whoever kills any person, the murderer must be put to death by the testimony of witnesses; but one witness cannot testify against any person to cause him to be put to death.