By the Pricking of My Thumbs, Something Wicked This Way Comes

Double, double toil and trouble;
Fire burn, and caldron bubble
Fillet of a fenny snake,
In the caldron 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 owlet's wing,—
For a charm of powerful trouble,
Like a hell-broth boil and bubble.

Double, double toil and trouble;
Fire burn, and caldron 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 ingrediants of our caldron.

Double, double toil and trouble;
Fire burn, and caldron bubble.
Cool it with a baboon's blood,
Then the charm is firm and good.

-William Shakespeare, 'Macbeth'-