Leviticus 10:9-11

EJ2000(i) 9 Do not drink wine nor strong drink, thou, nor thy sons with thee when ye go into the tabernacle of the testimony, lest ye die; it shall be a perpetual statute throughout your generations; 10 and this is that ye may discern between the holy and the profane and between the unclean and the clean 11 and that ye may teach the sons of Israel all the statutes which the LORD has spoken unto them by the hand of Moses.