In the first aliyah we read of a man named Korach in the Kehos family within the tribe of Levy. He starts a rebellion against Moshe along with 250 men of renown from the congregation. They claim that Moshe and Aharon are no holier than the rest of the congregation. Therefore they want to know why do Moshe and Aharon act in a special capacity, above the rest of the congregation? Moshe answers that in the morning they will hear G-d's decision.