Kommentar zu Bamidbar 17:16

'ויקח מאתם מטה, מטה וגו, after the people had complained about the incense accusing Moses and Aaron as causing death among the people (verse 6) and there had not been clear cut proof that the priesthood was reserved for Aaron and his direct descendants, G’d told Moses that He would furnish additional proof of this, the kind of proof which would preclude any further challenge to this as an established fact confirmed by G’d through a miracle.