Numbers 4:28-30

World English Bible

²⁸ This is the service of the families of the sons of the Gershonites in the Tent of Meeting. Their duty shall be under the hand of Ithamar the son of Aaron the priest.

²⁹ “As for the sons of Merari, you shall count them by their families, by their fathers’ houses; ³⁰ you shall count them from thirty years old and upward even to fifty years old—everyone who enters on the service, to do the work of the Tent of Meeting.