Numbers 17:9-10

9Moses brought out all the rods from the presence of Lord to all the Israelites; and they looked, and each man took his rod.

10But the Lord said to Moses, “Put Aaron’s rod back before the Testimony [in the ark], to be kept as a [warning] sign for the rebellious and contentious, so that you may put an end to their murmurings [of discontent] against Me, so that they do not die.”