Leviticus 10
1 Ref And Nadab and Abihu, the sons of Aaron, took their vessels and put fire in them and perfume, burning strange fire before the Lord, which he had not given them orders to do.
2 Ref And fire came out from before the Lord, burning them up and causing their destruction before the Lord.
3 Ref Then Moses said to Aaron, This is what the Lord said, I will be holy in the eyes of all those who come near to me, and I will be honoured before all the people. And Aaron said nothing.