Bamidbar Chapter 16 covers the rebellion of Korach, the most significant and explicit challenge to Moshe and Aharon's leadership in Sefer Bamidbar, involving three distinct groups: Korach and the Levites, Datan and Aviram from the tribe of Reuven, and 250 princes of the congregation. Korach claims Aharon's priesthood is illegitimate, while Datan and Aviram accuse Moshe of failing to deliver on his promises, even calling Egypt the "land flowing with milk and honey." Moshe proposes a divine test through ketores offerings, and God responds with the most extreme punishment in Bamidbar — the earth swallows Korach and his allies alive, and fire from Hashem consumes the 250 men who offered incense.