1623 — William Shakespeare, Macbeth, Act IV, Scene I:
Double, double toil and trouble;
Fire burn, and cauldron bubble.
1977 — Italo Calvino, The Castle of Crossed Destinies (trans. William Weaver; original Italian novel published 1973), Part 2, Chapter 2:
A naked goddess takes two jugs containing who knows what juices kept cool for the thirsty (all around there are the yellow dunes of a sun-baked desert), and empties them to water the pebbled shore; and at that instant a growth of saxifrage springs up in the midst of the desert, and among the succulent leaves a blackbird sings; life is the waste of material thrown away, the sea’s cauldron merely repeats what happens within constellations that for billions of years go on pounding atoms in the mortars of their explosions, obvious here even in the milk-colored sky.
1997 — J. K. Rowling, Harry Potter and the Philosopher's Stone, Raincoast Books, ISBN9781551923963, page 102:
[…] I don't expect you will really understand the beauty of the softly simmering cauldron with its shimmering fumes, the delicate power of liquids that creep through human veins, bewitching the mind, ensnaring the senses … […]
2004 — Carl Neal, The Magick Toolbox: The Ultimate Compendium for Choosing and Using Ritual Implements and Magickal Tools, Red Wheel/Weiser, LLC (2004), ISBN9781578633241, unnumbered page:
Large cauldrons are a little tricky to locate, but are well worth the search if you have a place to safely store and use one.