Leviticus 10
9 Ref 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 Ref and that ye may make a distinction between the holy and the common, and between the unclean and the clean;
11 Ref and that ye may teach the children of Israel all the statutes which Jehovah hath spoken unto them by Moses.