Numbers 4:29; Numbers 4:31; Numbers 4:33

29 "As for the sons of Merari, you shall list them by their clans and their fathers' houses.

31 And this is what they are charged to carry, as the whole of their service in the tent of meeting: the frames of the tabernacle, with its bars, pillars, and bases,

33 This is the service of the clans of the sons of Merari, the whole of their service in the tent of meeting, under the direction of Ithamar the son of Aaron the priest."