The "Three Witches," also known as the Weird Sisters, are characters from William Shakespeare's play Macbeth. They are supernatural beings who prophesy the future, influencing the actions of Macbeth, a Scottish nobleman. Their famous chant, "Double, double toil and trouble," highlights their connection to dark magic. In the play, the witches symbolize fate and ambition, as they predict that Macbeth will become king. Their presence sets off a chain of events that lead to Macbeth's tragic downfall. The witches are often interpreted as a representation of the chaotic forces in nature and the moral ambiguity of their prophecies.