Numbers 3:1-32

Now these are the records of the generations of Aaron and Moses in the day when the LORD spoke [by special revelation] with Moses on Mount Sinai. These are the names of the sons of Aaron: Nadab the firstborn, Abihu, Eleazar, and Ithamar. These are the names of the sons of Aaron, the priests who were anointed, whom Aaron consecrated and ordained to minister in the priest’s office. But Nadab and Abihu died in the presence of the LORD when they offered strange (unholy, unacceptable, inappropriate) fire before the LORD in the Wilderness of Sinai; and they had no sons. So Eleazar and Ithamar served as priests in the presence and under the supervision of Aaron their father. [Lev 10:1-4] Then the LORD spoke to Moses, saying, “Bring the tribe of Levi near and present them before Aaron the priest, so that they may serve him. They shall carry out the duties for him and for the whole congregation before the Tent of Meeting, doing the service of the tabernacle. They shall also take care of all the furnishings and utensils of the Tent of Meeting, and [attend to] the duties of the Israelites, doing the service of the tabernacle. You shall give the Levites to Aaron and to his sons [as servants and helpers]; they are to be given wholly to him from among the Israelites. So you shall appoint Aaron and his sons, and they shall observe and attend to their priesthood; but the layman (non-Levite) who approaches [the holy things] shall be put to death.” Again the LORD spoke to Moses, saying, “Behold, I have taken the Levites from among the sons of Israel instead of and as a substitute for every firstborn, that is, the first that opens the womb among the Israelites. So the Levites shall be Mine, for all the firstborn are Mine. On the day that I killed all the firstborn in the land of Egypt, I consecrated for Myself all the firstborn in Israel, both man and animal. They shall be mine; I am the LORD.” Then the LORD spoke to Moses in the Wilderness of Sinai, saying, “Number the sons of Levi by their fathers’ households, by their families (clans). You shall number every male from a month old and upward.” So Moses numbered them just as he was commanded by the word (mouth) of the LORD. These are the [three] sons of Levi by their names: Gershon, Kohath, and Merari. These are the names of the [two] sons of Gershon by their families: Libni and Shimei; and the [four] sons of Kohath by their families: Amram, Izhar, Hebron, and Uzziel; and the [two] sons of Merari by their families: Mahli and Mushi. These are the families of the Levites by their fathers’ households. Of Gershon were the families of the Libnites and of the Shimeites. These are the families of the Gershonites. The males who were numbered, every male from a month old and upward totaled 7,500. The families of the Gershonites were to camp behind the tabernacle on the west, and the leader of the fathers’ households of the Gershonites was Eliasaph the son of Lael. Now the responsibilities of the sons of Gershon in the Tent of Meeting involved the tabernacle and the tent, its covering, and the curtain for the doorway of the Tent of Meeting, and the hangings of the courtyard, the curtain for the doorway of the courtyard which is around the tabernacle and the altar, its tent ropes, and all the service concerning them. Of Kohath were the families of the Amramites, the Izharites, the Hebronites, and the Uzzielites; these are the families of the Kohathites. The males who were numbered, every male from a month old and upward totaled 8,600, attending to the duties of the sanctuary. The families of the sons of Kohath were to camp on the south side of the tabernacle, and the leader of the fathers’ households of the families of the Kohathites was Elizaphan the son of Uzziel. Now their responsibilities involved the ark, the table [on which the bread of the Presence was placed], the lampstand, the altars, the utensils of the sanctuary with which the priests minister, and the curtain, and all the service concerning them. Eleazar, the son of Aaron the priest, was chief of the leaders of the Levites; he supervised those who performed the duties of the sanctuary.