Macbeth, Act IV, Scene I [Round about the cauldron go] by William Shakespeare

The three witches, casting a spell Round about the cauldron go; In the poison'd entrails throw. Toad, that under cold stone Days and nights hast thirty one Swelter'd venom sleeping got, Boil thou first i' the charmed pot.         Double, double toil and trouble;         Fire burn and cauldron bubble. Fillet of a fenny snake, In the cauldron boil and bake; Eye of newt, and toe of frog, Wool of bat, and tongue of dog, Adder's fork, and blind-worm's sting, Lizard's leg, and howlet's wing, For a charm of powerful trouble, Like a hell-broth boil and bubble.          Double, double toil and trouble;          Fire burn and cauldron bubble. Scale of dragon, tooth of wolf, Witches' mummy, maw and gulf Of the ravin'd salt-sea shark, Root of hemlock digg'd i' the dark, Liver of blaspheming Jew, Gall of goat, and slips of yew Sliver'd in the moon's eclipse, Nose of Turk, and Tartar's lips, Finger of birth-strangled babe Ditch-deliver'd by a drab, Make the gruel thick and slab: Add thereto a tiger's chaudron, For the ingredients of our cauldron.           Double, double toil and trouble;           Fire burn and cauldron bubble.