The Witches from "The Tragedy of Macbeth" (Act 4, Scene 1)​​​​​​​

[.]

"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.
Double, double toil and trouble;
Fire burn, and cauldron bubble."
--The Witches from "The Tragedy of Macbeth" (Act 4, Scene 1)


William Shakespeare