An illumination from the Beatus of Liébana manuscript depicting a scene from the Book of Revelation.
"The third angel blew his trumpet. A large star, burning like a torch, fell from the sky. It fell on a third of the rivers and on the springs of water. The star was called Wormwood. A third of the waters turned to wormwood, and many people died from the water, because it had been made bitter."
Revelation 8:10–11