Leviticus 10:8-11

10:8 And the LORD spake unto Aaron, saying, 10:9 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: 10:10 And that ye may put difference between holy and unholy, and between unclean and clean; 10:11 And that ye may teach the children of Israel all the statutes which the LORD hath spoken unto them by the hand of Moses.