Revelation 8:10-11

Darby Translation

¹⁰ And the third angel sounded [his] trumpet: and there fell out of the heaven a great star, burning as a torch, and it fell upon the third part of the rivers, and upon the fountains of waters.

¹¹ And the name of the star is called Wormwood; and the third part of the waters became wormwood, and many of the men died of the waters because they were made bitter.