17And these were the sons of Levi by their names; Gershon, and Kohath, and Merari. 18And these are the names of the sons of Gershon by their families; Libni, and Shimei. 19And the sons of Kohath by their families; Amram, and Izehar, Hebron, and Uzziel. 20And the sons of Merari by their families; Mahli, and Mushi. These are the families of the Levites according to the house of their fathers.21Of Gershon was the family of the Libnites, and the family of the Shimites: these are the families of the Gershonites. 22Those that were numbered of them, according to the number of all the males, from a month old and upward, even those that were numbered of them were seven thousand and five hundred. 23The families of the Gershonites shall pitch behind the tabernacle westward.