“You and your sons are not to drink wine or strong drink when you enter the Tent of Meeting, or else you will die; this is a permanent statute for the generations to come.
9. Do not drink wine, nor strong drink. The second cleanness required in the priests is that they should abstain from wine, and strong drink; Lat., “sicera.” Fr, “ce qui est nomme en Hebrieu Sechar.” Blunt, “The veracity of the Books of Moses, etc.,” art.
Aaron having been very observant of what God said to him by Moses, now God does him the honour to speak to him immediately (Lev 10:8): The Lord spoke unto Aaron, and the rather because what was now to be said Aaron might perhaps have taken amiss from Moses, as if he had suspected him to have been a gluttonous man and a wine-bibber, so...
Commenting on Leviticus 10:8-11
And that ye may put difference between holy and unholy,.... That being sober they might be able to distinguish between the one and the other; which a drunken man, having his mind and senses disturbed, is not capable of; as between holy and unholy persons, and between holy and unholy things; particularly, as Aben Ezra interprets it, between a sacred place and one that is...