Charles Ellicott Commentary Deuteronomy 11:6

"and what he did unto Dathan and Abiram, the sons of Eliab, the son of Reuben; how the earth opened its mouth, and swallowed them up, and their households, and their tents, and every living thing that followed them, in the midst of all Israel:" — Deuteronomy 11:6 (ASV)

What he did unto Dathan and Abiram... .— See Numbers 16. It is impossible to separate the rebellion of Korah from that of Dathan and Abiram, and since the whole point of Korah’s rebellion was the priesthood, it is difficult to see how the writer of Deuteronomy could be ignorant of any priesthood except that of the whole tribe of Levi. The object of Korah’s rebellion was to abolish the distinction between a Kohathite and a priest.