11-13 God spoke to Moses: “I have taken the Levites from among the People of Israel as a stand-in for every Israelite mother’s firstborn son. The Levites belong to me. All the firstborn are mine—when I killed all the firstborn in Egypt, I consecrated for my own use every firstborn in Israel, whether human or animal. They belong to me. I am God.”
14-16 God spoke to Moses in the Wilderness of Sinai: “Count the Levites by their ancestral families and clans. Count every male a month old and older.” Moses counted them just as he was instructed by the mouth of God.
17 These are the names of the sons of Levi: Gershon, Kohath, and Merari.
18 These are the names of the Gershonite clans: Libni and Shimei.
19 The sons of Kohath by clan: Amram, Izhar, Hebron, and Uzziel.
20 The sons of Merari by clan: Mahli and Mushi.These are the clans of Levi, family by family.
21-26 Gershon was ancestor to the clans of the Libnites and Shimeites, known as the Gershonite clans. All the males who were one month and older numbered 7,500. The Gershonite clans camped on the west, behind The Dwelling, led by Eliasaph son of Lael. At the Tent of Meeting the Gershonites were in charge of maintaining The Dwelling and its tent, its coverings, the screen at the entrance to the Tent of Meeting, the hangings of the Courtyard, the screen at the entrance to the Courtyard that surrounded The Dwelling and Altar, and the cords—in short, everything having to do with these things.