Numbers 4:29-31

Amplified Bible, Classic Edition

²⁹ As for the sons of Merari, you shall number them by their families and their fathers’ houses;

³⁰ From thirty years old up to fifty years old you shall number them, everyone who enters the service to do the work of the Tent of Meeting.

³¹ And this is what they are assigned to carry and to guard [on the march], according to all their service in the Tent of Meeting: the boards or frames of the tabernacle, and its bars, and its pillars, and its sockets or bases,