His account will be settled on Doomsday; such a ledger operates in the tavern.

This couplet offers a playful yet profound reflection on how we live our lives. It humorously compares the 'tab' or 'credit' one might run at a liquor shop to a spiritual account that's only settled on the Day of Judgment. The poet is gently pointing out the human tendency to sometimes postpone accountability for our actions. It's like saying, "You might put off paying your bar bill, but the ultimate reckoning for your life's choices will surely come." It encourages us to think about our deeds and their eventual consequences, reminding us that even if we delay facing up to things now, a final settlement awaits.