SCENE I. A cavern. In the middle, a boiling cauldron.

Thunder. Enter the three Witches

First Witch

Thrice the brinded cat hath mew'd.

Second Witch

Thrice and once the hedge-pig whined.

Third Witch

Harpier cries 'Tis time, 'tis time.

First Witch

Round about the cauldron go;
In the poison'd entrails throw.
Toad, that under cold stone
Days and nights has thirty-one
Swelter'd venom sleeping got,
Boil thou first i' the charmed pot.

ALL

Double, double toil and trouble;
Fire burn, and cauldron bubble.

...