1st WITCH: Round about the cauldron go,
In the poisoned entrails throw:

ALL: Double, double, toil and trouble:
Fire burne, and cauldron bubble.

2nd WITCH: Eye of newt, and toe of frogge,
Wool of bat, and tail of dogge,
Adder's tongue, and blind-worm's sting,
Lizard's leg, and owlet's wing,
For a charme of powerful trouble,
Like a Hell-broth, boil and bubble.

ALL: Double, double, toil and trouble:
Fire burne, and cauldron bubble.

3rd WITCH: Scale of dragon, tooth of wolfe;
Witch's mummy; throat and guts
of the fearsome salt-sea sharke;
Roote of hemlock, digged in the darke.
Coole it with a baboone's blood:
Then the charm is firm and good ...

From Macbeth, Act 4 Scene 1