Bible Verses About Presumption: Korah &c

They came together against Moses and Aaron and told them, “You have taken too much upon yourselves! For everyone in the entire congregation is holy, and the LORD is in their midst. Why then do you exalt yourselves above the assembly of the LORD?”

and tomorrow you are to place fire and incense in them in the presence of the LORD. Then the man the LORD chooses will be the one who is holy. It is you sons of Levi who have taken too much upon yourselves!”