The LORD said to Moses, “Put Aaron’s staff back in front of the Testimony, to be kept as a sign for the rebellious, so that you may put an end to their grumbling against Me, lest they die.”
10. And the Lord said unto Moses. What God had prescribed concerning the censers, He now commands as to the rod, i.e., that it should be preserved as a monument for future ages; because men are forgetful and slow to consider His works, and not only so, but because they bury their memory as if of deliberate malice, he bids, therefore, and not without reproach...
Here is, I. The final determination of the controversy concerning the priesthood by a miracle, Num 17:8, Num 17:9. The rods or staves were brought out from the most holy place where they were laid up, and publicly produced before the people; and, while all the rest of the rods remained as they were, Aaron's rod only, of a dry stick, became a living branch...
Commenting on Numbers 17:8-13
And Moses did so; as the Lord commanded him, even so did he. Took Aaron's rod, and laid it up before the ark for the purpose mentioned, being a faithful servant to God in all his house. And Moses did so; as the Lord commanded him, even so did he.