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.

from "Macbeth" by William Shakespeare