Leviticus 10:1-6

¹And 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.

²And fire came out from before the Lord, burning them up and causing their destruction before the Lord.

³Then 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.

⁴And Moses sent for Mishael and Elzaphan, the sons of Uzziel, the brother of Aaron's father, and said to them, Come near and take your brothers away from before the holy place, outside the tent-circle.

⁵So they came and took them, in their coats, outside the tent-circle, as Moses had said.

⁶And Moses said to Aaron and to Eleazar and Ithamar, his sons, Do not let your hair be loose, and give no signs of grief; so that death may not overtake you, and his wrath come on all the people; but let there be weeping among your brothers and all the house of Israel for this burning of the Lord's fire.