cauldron bubble

The weird sisters, hand in hand, posters of the sea and land,

Thus do go about, about, thrice to thine, and thrice to mine,

And thrice again, to make up nine.

~

Round about the cauldron go; in the poison’d entrails throw.

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

For a charm of powerful trouble, like a hell-broth boil and bubble.

&
Macbeth –Shakespeare