Leviticus 10:6-7

6Then Moses said to Aaron and to his sons Eleazar and Ithamar, “1Do not 2uncover your heads nor tear your clothes, so that you do not die and He does not 3become wrathful against all the congregation. But your 4kinsmen, the entire house of Israel, shall weep for the burning which the Lord has 5brought about. 7You shall not even go out from the doorway of the tent of meeting, or you will die; for 6the Lord’s anointing oil is upon you.” So they did according to the word of Moses.