Numbers 3:30

3:30 Now the leader of the clan of the families of the Kohathites was Elizaphan son of Uzziel.

Numbers 4:18

4:18 “Do not allow the tribe of the families of the Kohathites to be cut off from among the Levites;

Numbers 4:34

Summary

4:34 So Moses and Aaron and the leaders of the community numbered the Kohathites by their families and by clans,