Sleep shall neither night nor day
Hang upon his pent-house lid.

– William Shakespeare

Macbeth, Act 1, Scene 3. One of the Witches plans a revenge curse for a sailor whose wife has offended her by refusing to share her chestnuts with her. The sailor will be unable to sleep during the night or the day. Later in the play Macbeth and his wife suffer troubled sleep and nightmares and this passage foreshadows that.