Drink not wine — it is not improbable, that the sin of Nadab and Abihu was owing to this very thing. But if not, yet drunkenness is so odious a sin in itself, especially in a minister, and most of all in the time of his administration of sacred things, that God saw fit to prevent all occasions of it. And hence the devil, who is God's ape, required this abstinence from his priests in their idolatrous service.
Related Commentaries of Leviticus 10:9
Leviticus 10:9
9 Do not drink wine nor strong drink, thou, nor thy sons with thee, when ye go into the tabernacle of the congregation, lest ye die: it shall be a statute for ever throughout your generations: