I will not yield,
To kiss the ground before young Malcolm’s feet,
…Lay on, Macduff,
And damn’d be him that first cries, “Hold, enough!”

– William Shakespeare

Macbeth, Act 5, Scene 8. Macbeth knows that he has been misled by the Witches, but as Macduff confronts him and demands that he yield he regains his courage. A defiant Macbeth refuses to yield and prepares to fight Macduff to the death.