Numbers 3:20

3:20 The sons of Merari by their families were Mahli and Mushi. These are the families of the Levites by their clans.

Numbers 3:33-37

The Numbering of Merari

3:33 From Merari came the family of the Mahlites and the family of the Mushites; these were the families of Merari. 3:34 Those of them who were numbered, counting every male from a month old and upward, were 6,200. 3:35 Now the leader of the clan of the families of Merari was Zuriel son of Abihail. These were to camp on the north side of the tabernacle.

3:36 The appointed responsibilities of the Merarites included the frames of the tabernacle, its crossbars, its posts, its sockets, its utensils, plus all the service connected with these things, 3:37 and the pillars of the courtyard all around, with their sockets, their pegs, and their ropes.

Numbers 4:29-33

The Service of the Merarites

4:29 “As for the sons of Merari, you are to number them by their families and by their clans. 4:30 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. 4:31 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, 4:32 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. 4:33 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.”