Matthew Henry on Leviticus 10:8-11
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 apt are we to resent cautions as accusations; therefore God saith it himself to him, Do not drink wine, nor strong drink, when you go into the tabernacle, and this at their peril, lest you die, Lev 10:9. Probably they had seen the ill effect of it in Nadab and Abihu, and therefore must take warning by them. Observe here, 1. The prohibition itself: Do not drink…
Read the whole note in the consoleJamieson-Fausset-Brown on Leviticus 10:8
Do not drink wine nor strong drink--This prohibition, and the accompanying admonitions, following immediately the occurrence of so fatal a catastrophe [Lev 10:1-2], has given rise to an opinion entertained by many, that the two disobedient priests were under the influence of intoxication when they committed the offense which was expiated only by their lives. But such an idea, though the presumption is in its favor, is nothing more than conjecture.
Adam Clarke on Leviticus 10:10
That we may put difference between holy and unholy - This is a strong reason why they should drink no inebriating liquor, that their understanding being clear, and their judgment correct, they might be always able to discern between the clean and the unclean, and ever pronounce righteous judgment. Injunctions similar to this were found among the Egyptians, Carthaginians, and Greeks. Indeed, common sense itself shows that neither a drunkard nor a sot should ever be suffered to minister in holy things.
John Gill on 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 P…