2-5. Speak unto the children of Israel--The controversy with Moses and Aaron about the priesthood was of such a nature and magnitude as required a decisive and authoritative settlement. For the removal of all doubts and the silencing of all murmuring in the future regarding the holder of the office, a miracle was wrought of a remarkable character and permanent duration; and in the manner of performing it, all the people were made to have a direct and special interest.
      take of every one . . . princes . . . twelve rods--As the princes, being the oldest sons of the chief family, and heads of their tribes, might have advanced the best claims to the priesthood, if that sacred dignity was to be shared among all the tribes, they were therefore selected, and being twelve in number--that of Joseph being counted only one--Moses was ordered to see that the name of each was inscribed--a practice borrowed from the Egyptians--upon his rod or wand of office. The name of Aaron rather than of Levi was used, as the latter name would have opened a door of controversy among the Levites; and as there was to be one rod only for the head of each tribe, the express appointment of a rod for Aaron determined him to be the head of that tribe, as well as that branch or family of the tribe to which the priestly dignity should belong. These rods were to be laid in the tabernacle close to the ark (compare Nu 17:10 and Heb 9:4), where a divine token was promised that would for all time terminate the dispute.

JFB.