Numbers 3:20

3:20 The sons of Merari by their families were Mahli and Mushi. These are the families of the Levites by their clans.

Numbers 26:57-58

26:57 And these are the Levites who were numbered according to their families: from Gershon, the family of the Gershonites; of Kohath, the family of the Kohathites; from Merari, the family of the Merarites. 26:58 These are the families of the Levites: the family of the Libnites, the family of the Hebronites, the family of the Mahlites, the family of the Mushites, the family of the Korahites. Kohath became the father of Amram.