Numbers 17:3

of these sinners against their own souls, and do thou make them beaten plates a covering to the altar, because they were brought before the Lord and hallowed; and they became a sign to the children of Israel.

And thou shalt write Aaron’s name upon the rod of Levi: for one rod shall be for the head of the house of their fathers.

You shall write Aaron’s name on Levi’s rod. There shall be one rod for each head of their fathers’ houses.