TheThree Witches, also known as the Weird SistersorWayward Sisters, are characters in MacbethbyWilliam Shakespeare. The witches eventually lead Macbeth to his demise, and hold a striking resemblance to the Three Fates of classical mythology (The Moirai). Shakespeare’s witches are prophets who hail Macbeth early in the play, and predict his ascent to kingship. Upon killing the king and gaining the throne of Scotland, Macbeth hears them ambiguously predict his eventual downfall. The witches, and their ‘filthy’ trappings and supernatural activities, set an ominous tone for the play. The infamous ‘Double double toil and trouble, Fire burn and cauldron bubble‘ is a rhyming couplet chanted by the three witches. It is among the most quoted lines from Shakespeare, mainly because of its sing-song rhythm and its rhyming.