(1)Song of the Witches: "Double, double toil and trouble"

(2) by william shakespeare

(3)(from Macbeth)

(4)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 howlet's wing, For a charm of powerful trouble, Like a hell-broth boil and bubble.

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

(6)Notes:
Macbeth: IV.i 10-19; 35-38