And the Lord spoke unto Moses. Howsoever stubborn the Israelites might be, yet their hardness of heart being now subdued, and their pride broken down, they ought to have acknowledged the authority of the priesthood, and to have perpetually held it in pious reverence. But it is plain from the confirmation of it, which is now added, that they were not yet thoroughly overcome. For God never appoints anything in vain; the remedy, therefore, was necessary, that He now applied to that disease of obstinacy which He perceived still to maintain its secret hold upon their hearts. Herein we also behold His inestimable goodness, when He not only had regard to the relief of their infirmity, but even struggled with their depravity and perverseness, in order to restore them to their senses. In the same way also He now deals with us, for he not only strengthens the weakness of our faith by many aids, but He puts constraint upon our light and inconstant minds, and retains us in the path of duty though we strive against Him. He likewise anticipates our willfulness, so as to keep us from growing presumptuous, or rouses us up when we are disposed to be slothful. In fact, his our business so to apply to our use whatever helps to faith and piety He sets before us, as to be assured that they are so many pieces of evidence to convict us of unbelief Although, therefore, the majesty of the priesthood had been already sufficiently, and more than sufficiently established, still God saw float in the extreme perversity of the people there would be no end to their murmurs and rebellions, unless the final ratification were added, and that, too, in a season of repose, inasmuch as, whilst the sedition was in progress, they were not so disposed and ready to learn. By this confirmation, then, He set aside whatever doubts could at any time arise, when Aaron's rod, severed as it was from the tree, was the only one of the twelve which blossomed. For it was no natural circumstance that a branch which derived no sap from the root, and which at that season of the year would have been dry upon the tree, should produce flowers and fruit, when it was east before the Ark of the Covenant, whilst the others, although altogether similar, remained dry and dead.

And the LORD spake unto (a) Moses, saying,
(a) While he was in the door of the tabernacle.

And the Lord spake unto Moses,.... After the plague ceased, for the further confirmation of the priesthood in Aaron's family, another method is directed to by the Lord:
saying: as follows.

It is an instance of the grace of God, that, having wrought divers miracles to punish sin, he would work one more to prevent it. Twelve rods or staves were to be brought in. It is probable that they were the staves which the princes used as ensigns of their authority; old dry staves, that had no sap in them. They were to expect that the rod of the tribe, or prince, whom God chose to the priesthood, should bud and blossom. Moses did not object that the matter was sufficiently settled already; he did not undertake to determine it; but left the case before the Lord.

(Or ch.17:16-28). Confirmation of the High-Priesthood of Aaron. - Whilst the Lord had thus given a practical proof to the people, that Aaron was the high priest appointed by Him for His congregation, by allowing the high-priestly incense offered by Aaron to expiate His wrath, and by removing the plague; He also gave them a still further confirmation of His priesthood, by a miracle which was well adapted to put to silence all the murmuring of the congregation.