Numbers 4:41-43

New American Standard Bible

⁴¹ These were the numbered men of the families of the sons of Gershon, everyone who was serving in the tent of meeting, whom Moses and Aaron counted according to the ^[a]commandment of the Lord.

⁴² And the numbered men of the families of the sons of Merari by their families, by their fathers’ households, ⁴³ from ^(A)thirty years old and upward even to fifty years old, everyone who could enter the service for work in the tent of meeting—