Macbeth, Act 3

Lady Macbeth scolds her husband saying his solitude will bring speculation from others. Macbeth enters looking upset and she counsels him to stop mulling over the crimes they have committed. But Macbeth declares that their job is not done: he still spends every waking moment in fear and every night embroiled in nightmares. He even envies Duncan, who now sleeps peacefully in his grave. Lady Macbeth warns him to act cheerful in front of their dinner guests. She also tries to comfort him by reminding him that Banquo and Fleance are by no means immortal. Macbeth responds by telling her that "a deed of dreadful note" will be done in the night, though he will not divulge the details.