Leviticus 10:9

⁷  And 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.

⁸  And the LORD spake unto Aaron, saying,

⁹  Do not drink wine nor strong drink, thou, nor thy sons with thee, when ye go into the tabernacle of the congregation, lest ye die: it shall be a statute for ever throughout your generations:

¹⁰  And that ye may put difference between holy and unholy, and between unclean and clean;

¹¹  And that ye may teach the children of Israel all the statutes which the LORD hath spoken unto them by the hand of Moses.