Revelation 16:4

And the third poured out his phial on the rivers and fountains of waters, and they became blood.

Revelation 8:10-11

And the third angel sounded, and there fell from heaven a great star burning as a lamp, and it fell on the third part of the rivers, and on the fountains of waters.

Revelation 14:7

and tribe, and tongue, and people, Saying with a loud voice, Fear God and give glory to him, for the hour of his judgment is come: and worship him that made the heaven, and the earth, and the sea, and fountains of water.

Revelation 16:5

And I heard the angel of the waters saying, Righteous art thou, who art, and who wast, the Gracious one, because thou hast judged thus.

Treasury of Scripture Knowledge

Summary

And the third angel poured out his vial upon the rivers and fountains of waters; and they became blood.

Bible References

Upon

Revelation 8:10
And the third angel sounded, and there fell from heaven a great star burning as a lamp, and it fell on the third part of the rivers, and on the fountains of waters.