Revelation 8:8-11

American Standard Version

⁸ And the second angel sounded, and as it were a great mountain burning with fire was cast into the sea: and the third part of the sea became blood; ⁹ and there died the third part of the creatures which were in the sea, even they that had life; and the third part of the ships was destroyed.

¹⁰ And the third angel sounded, and there fell from heaven a great star, burning as a torch, and it fell upon the third part of the rivers, and upon the fountains of the waters; ¹¹ and the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.