3 You shall write Aaron’s name on Levi’s rod. There shall be one rod for each head of their fathers’ houses.
Numbers 17:3 Cross References - WEB
Exodus 6:16
16 These are the names of the sons of Levi according to their generations: Gershon, and Kohath, and Merari; and the years of the life of Levi were one hundred thirty-seven years.
Exodus 6:20
20 Amram took Jochebed his father’s sister to himself as wife; and she bore him Aaron and Moses. The years of the life of Amram were one hundred thirty-seven years.
Numbers 3:2-3
Numbers 18:1
1 Yahweh said to Aaron, “You and your sons and your fathers’ house with you shall bear the iniquity of the sanctuary; and you and your sons with you shall bear the iniquity of your priesthood.
Numbers 18:7
7 You and your sons with you shall keep your priesthood for everything of the altar, and for that within the veil. You shall serve. I give you the service of the priesthood as a gift. The stranger who comes near shall be put to death.”