Exodus 6:18-19

6:18 The sons of Kohath were Amram, Izhar, Hebron, and Uzziel. (The length of Kohath’s life was 133 years.)

6:19 The sons of Merari were Mahli and Mushi. These were the clans of Levi, according to their records.

Exodus 6:24

6:24 The sons of Korah were Assir, Elkanah, and Abiasaph. These were the Korahite clans.