Revelation 16:4

The THIRD angel poured out his vial upon the rivers and fountains; and they became blood.

Revelation 8:10-11

And the third angel sounded, and there fell a great star from heaven, burning like a flambeau, and it fell upon the third part of the rivers, and upon the fountains of waters.

Revelation 14:7

"fear the Lord, and give glory to him, for the hour of his judgment is come: adore therefore him that made the heaven, the earth, the sea, and the fountains."

Revelation 16:5

and I heard the angel of the waters say, "thou art just, who art, and hast always been holy, 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 a great star from heaven, burning like a flambeau, and it fell upon the third part of the rivers, and upon the fountains of waters.