Leviticus 10:8-11

8The Lord then spoke to Aaron, saying, 9 aDo not drink wine or strong drink, neither you nor your sons with you, when you come into the tent of meeting, so that you will not dieit is a perpetual statute throughout your generations 10and bso as to make a distinction between the holy and the profane, and between the unclean and the clean, 11and cso as to teach the sons of Israel all the statutes which the Lord has spoken to them through Moses.”
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