Revelation 8:10-11 - The Third Trumpet
10 The third angel blew his trumpet; and there fell from Heaven a great star, which was on fire like a torch. It fell upon a third part of the rivers and upon the springs of water. 11 The name of the star is 'Wormwood;' and a third part of the waters were turned into wormwood, and vast numbers of the people died from drinking the water, because it had become bitter.