Chanting "Double, double, toil and trouble," the three Witches stir the cauldron. . . . The witches call up apparitions which give Macbeth warnings, promises, and prophecies: beware Macduff, fear "none of woman born," fear nothing until Birnam wood come to Dunsinane, Banquo's issue shall be kings. . . . The Witches vanish and Macbeth calls in Lennox, who tells him that Macduff has fled to England, whereupon Macbeth orders the murder of Macduff's wife and children.