Leviticus 10:11

And that ye may teach the children of Israel all the statutes,.... Laws, precepts, ordinances, moral, ceremonial, and judicial, which was the business of the priests to do, Malachi 2:7 but one inebriated with liquor would be incapable of giving instructions about any of those things:

which the Lord hath spoken unto them by the hand of Moses: particularly those delivered and recorded in Exodus 20:1 and as not the priests, so neither any other Israelite might instruct s, nor indeed would be capable of instructing others when in liquor; and therefore excessive drinking, as it should be carefully avoided by all men, so more especially by those who by their office are teachers of others; see Proverbs 31:4.

s Maimon. Hilchot Biath Hamikdash, c. 1. sect. 3.