Leviticus 10:1-7

1And Nadab and Abihu, the sons of Aaron, took each of them his censer, and put fire in it, and put incense on it, and offered strange fire before the LORD, which he commanded them not. 2And there went out fire from the LORD, and devoured them, and they died before the LORD.

3Then Moses said to Aaron, This is what the LORD spoke, saying, I will be sanctified in them that come near me, and before all the people I will be glorified. And Aaron held his peace. 4And Moses called Mishael and Elzaphan, the sons of Uzziel the uncle of Aaron, and said to them, Come near, carry your brethren from before the sanctuary out of the camp. 5So they went near, and carried them in their coats out of the camp; as Moses had said. 6And Moses said to Aaron, and to Eleazar and to Ithamar, his sons, Uncover not your heads, neither rend your clothes; lest ye die, and lest wrath come upon all the people: but let your brethren, the whole house of Israel, bewail the burning which the LORD hath kindled. 7And ye shall not go out from the door of the tabernacle of the congregation, lest ye die: for the anointing oil of the LORD is upon you. And they did according to the word of Moses.