Leviticus 10:5-6

⁵And they came nigh, and carried them in their vestments out of the camp, as Mosheh had spoken.

⁶And Mosheh said to Aharon and to Elazar and to Ithamar his sons, Make not bare your heads, nor rend your garments, lest you die, and wrath be upon all the congregation; but let your brethren and all the house of Israel bewail the burning which the Lord hath kindled;