Revelation 8:8-11
English Standard Version
Chapter 8
8The second angel blew his trumpet, and something like a great mountain, burning with fire, was thrown into the sea, and a third of the sea became blood. 9A third of the living creatures in the sea died, and a third of the ships were destroyed.
10The third angel blew his trumpet, and a great star fell from heaven, blazing like a torch, and it fell on a third of the rivers and on the springs of water.
11The name of the star is Wormwood. A third of the waters became wormwood, and many people died from the water, because it had been made bitter.