Matthew Poole and continuators on 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:

This is here added, either because Nadab and Abihu had been led to their errour by drinking too much, which might easily fall out when they were feasting and full of joy for their entrance into so honourable and profitable an employment; or at lest because others might thereby be drawn to commit the same miscarriages, which they might now commit from other causes. Drunkenness is so odious a sin in it self, 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 Gods ape in his prescriptions for his worship, required this abstinence from his Priests in their Idolatrous services.

Marginal references: Ezek. 44. 21. 1 Tim. 3. 3.