Ancient damnation! O most wicked fiend!
…Go, counsellor;
Thou and my bosom henceforth shall be twain.

– William Shakespeare

Romeo and Juliet, Act 3, Scene 5. The close and trusting relationship Juliet enjoyed with the Nurse breaks down here, as Juliet feels she can no longer trust her. She believes that the Nurse has betrayed her by suggesting that she should follow her parents’ wishes and marry Paris. In a fit of rage she calls her former close confidante a "fiend," or devil.