Numbers 3:17-21

These were the sons of Levi by their names: Gershon, Kohath, and Merari. And these are the names of the sons of Gershon by their families: Libni and Shimei. And the sons of Kohath by their families: Amram, Izehar, Hebron, and Uzziel. And the sons of Merari by their families: Mahli and Mushi. These are the families of the Levites by their fathers’ houses. From Gershon came the family of the Libnites and the family of the Shimites; these were the families of the Gershonites.