Numbers 16:1-5,19,32-33 NLT
[1] One day Korah son of Izhar, a descendant of Kohath son of Levi, conspired with Dathan and Abiram, the sons of Eliab, and On son of Peleth, from the tribe of Reuben. [2] They incited a rebellion against Moses, along with 250 other leaders of the community, all prominent members of the assembly. [3] They united against Moses and Aaron and said, "You have gone too far! The whole community of Israel has been set apart by the LORD, and he is with all of us. What right do you have to act as though you are greater than the rest of the LORD's people?" [4] When Moses heard what they were saying, he fell face down on the ground. [5] Then he said to Korah and his followers, "Tomorrow morning the LORD will show us who belongs to him and who is holy. The LORD will allow only those whom he selects to enter his own presence. [19] Meanwhile, Korah had stirred up the entire community against Moses and Aaron, and they all gathered at the Tabernacle entrance. Then the glorious presence of the LORD appeared to the whole community, [32] The earth opened its mouth and swallowed the men, along with their households and all their followers who were standing with them, and everything they owned. [33] So they went down alive into the grave, along with all their belongings. The earth closed over them, and they all vanished from among the people of Israel.
Korah and his follower tried to bring down Moses and Aaron by saying that him and his people were just as Holy as the chosen servants of God (Moses and Aaron). It was rebellion and God dealt with them swiftly. Never underestimate the power and favor God has given a leader in your church because if you go against Gods chosen, you could be dealt with in a way that is not so wanted. Also, recognize that if you are a leader in your church, there will most always be someone that doesn't like or appreciate you.