Revelation 8:10 in the King James Version
And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters;
Context
9 and one third of the living creatures which were in the sea died. One third of the ships were destroyed.
10 The third angel sounded, and a great star fell from the sky, burning like a torch, and it fell on one third of the rivers, and on the springs of water.
11 The name of the star is “Wormwood.” One third of the waters became wormwood. Many people died from the waters, because they were made bitter.