Numbers 4:33-35

Amplified Bible, Classic Edition

³³ This is the work of the families of the sons of Merari, according to all their tasks in the Tent of Meeting, under the direction of Ithamar son of Aaron, the [high] priest.

³⁴ And Moses and Aaron and the leaders of the congregation numbered the sons of the Kohathites by their families and their fathers’ houses,

³⁵ From thirty years old up to fifty years old, everyone who enters the service to do the work of the Tent of Meeting;