Numbers 4:29-33 - Duties Of The Merarites
29 "As for the sons of Merari, you are to number them by their families and by their clans. 30 You must number them from thirty years old and upward to fifty years old, all who enter the company to do the work of the tent of meeting. 31 This is what they are responsible to carry as their entire service in the tent of meeting: the frames of the tabernacle, its crossbars, its posts, its sockets, 32 and the posts of the surrounding courtyard with their sockets, tent pegs, and ropes, along with all their furnishings and everything for their service. You are to assign by names the items that each man is responsible to carry. 33 This is the service of the families of the Merarites, their entire service concerning the tent of meeting, under the authority of Ithamar son of Aaron the priest."