21 The sons of Izhar: Korah, and Nepheg, and Zichri.
Exodus 6:21 Cross References - WEB
Exodus 6:24
24 The sons of Korah: Assir, and Elkanah, and Abiasaph; these are the families of the Korahites.
Numbers 16:1
1 Now Korah, the son of Izhar, the son of Kohath, the son of Levi, with Dathan and Abiram, the sons of Eliab, and On, the son of Peleth, sons of Reuben, took some men.
Numbers 16:32
32 The earth opened its mouth and swallowed them up with their households, all of Korah’s men, and all their goods.