"14 And the Lord spoke to Moses in the wilderness of Sinai, saying, 15 “List the sons of Levi, by fathers' houses and by clans; every male from a month old and upward you shall list.” 16 So Moses listed them according to the word of the Lord, as he was commanded. 17 And these were the sons of Levi by their names: Gershon and Kohath and Merari. 18 And these are the names of the sons of Gershon by their clans: Libni and Shimei. 19 And the sons of Kohath by their clans: Amram, Izhar, Hebron, and Uzziel. 20 And the sons of Merari by their clans: Mahli and Mushi. These are the clans of the Levites, by their fathers' houses.
21 To Gershon belonged the clan of the Libnites and the clan of the Shimeites; these were the clans of the Gershonites. 22 Their listing according to the number of all the males from a month old and upward was[a] 7,500. 23 The clans of the Gershonites were to camp behind the tabernacle on the west, 24 with Eliasaph, the son of Lael as chief of the fathers' house of the Gershonites. 25 And the guard duty of the sons of Gershon in the tent of meeting involved the tabernacle, the tent with its covering, the screen for the entrance of the tent of meeting, 26 the hangings of the court, the screen for the door of the court that is around the tabernacle and the altar, and its cords—all the service connected with these.
27 To Kohath belonged the clan of the Amramites and the clan of the Izharites and the clan of the Hebronites and the clan of the Uzzielites; these are the clans of the Kohathites. 28 According to the number of all the males, from a month old and upward, there were 8,600, keeping guard over the sanctuary. 29 The clans of the sons of Kohath were to camp on the south side of the tabernacle, 30 with Elizaphan the son of Uzziel as chief of the fathers' house of the clans of the Kohathites. 31 And their guard duty involved the ark, the table, the lampstand, the altars, the vessels of the sanctuary with which the priests minister, and the screen; all the service connected with these. 32 And Eleazar the son of Aaron the priest was to be chief over the chiefs of the Levites, and to have oversight of those who kept guard over the sanctuary.
33 To Merari belonged the clan of the Mahlites and the clan of the Mushites: these are the clans of Merari. 34 Their listing according to the number of all the males from a month old and upward was 6,200. 35 And the chief of the fathers' house of the clans of Merari was Zuriel the son of Abihail. They were to camp on the north side of the tabernacle. 36 And the appointed guard duty of the sons of Merari involved the frames of the tabernacle, the bars, the pillars, the bases, and all their accessories; all the service connected with these; 37 also the pillars around the court, with their bases and pegs and cords.
38 Those who were to camp before the tabernacle on the east, before the tent of meeting toward the sunrise, were Moses and Aaron and his sons, guarding the sanctuary itself, to protect[b] the people of Israel. And any outsider who came near was to be put to death. 39 All those listed among the Levites, whom Moses and Aaron listed at the commandment of the Lord, by clans, all the males from a month old and upward, were 22,000."
Numbers 3:14-39
The substance of this central section of the chapter concerns the numbering of the tribe of Levi, and the appointment of tasks to the individual groups within it, who are represented by the families of Gershom, Kohath and Merari. These were the families that formed an inner circle round the Tabernacle, with the Gershonites on the west, the Kohathites on the south, and the Merarites on the north (with Moses, Aaron and his sons on the west). To the Gershonites (2126) was given the care of the whole Tabernacle fabric (its actual structure was the re- sponsibility of the Merarites, 36). The original account of the arrangements for the construction of the Tabernacle in Exodus 25ff may be usefully consulted, especially 26:16, also 1 Chronicles 15 (and cf also Numbers 4:2128). In 2732 the responsibilities of the Kohathites are said to be the care of the sacred contents of the Tabernacle, the Ark, the table, the lamp- stand or candlestick, and the vessels of the sanctuary. They were therefore, entrusted with the most important and valuable items of the sanctuary. Why they, the family of the second son of Levi, should be given this preference is unknown, although in the next chapter (4:2ff) they are placed first, as also in 1 Chronicles 15:5. To the Merarites (3337) was given the custody and charge of the 'boards of the tabernacle, the bars, the pillars, the sockets, and all the vessels thereof.'