Numbers 4:41-43

Revised Standard Version Catholic Edition

⁴¹ This was the number of the families of the sons of Gershon, all who served in the tent of meeting, whom Moses and Aaron numbered according to the commandment of the Lord.

⁴² The number of the families of the sons of Merar′i, by their families and their fathers’ houses, ⁴³ from thirty years old up to fifty years old, every one that could enter the service, for work in the tent of meeting—