Leviticus 10:9 ASV

⁷  And ye shall not go out from the door of the tent of meeting, lest ye die; for the anointing oil of Jehovah is upon you. And they did according to the word of Moses.

⁸  And Jehovah spake unto Aaron, saying,

⁹  Drink no wine nor strong drink, thou, nor thy sons with thee, when ye go into the tent of meeting, that ye die not: it shall be a statute for ever throughout your generations:

¹⁰  and that ye may make a distinction between the holy and the common, and between the unclean and the clean;

¹¹  and that ye may teach the children of Israel all the statutes which Jehovah hath spoken unto them by Moses.