Revelation 8
10 Ref And at the sounding of the third angel, there went down from heaven a great star, burning like a flame, and it came on a third part of the rivers, and on the fountains of water.
11 Ref And the name of the star is Wormwood: and a third part of the waters became bitter; and a number of men came to their end because of the waters, for they were made bitter.
12 Ref And at the sounding of the fourth angel, a third part of the sun, and of the moon, and of the stars was made dark, so that there was no light for a third part of the day and of the night.