Revelation 16:4

Then the third angel emptied his bowl upon the rivers and springs of water; and it turned to blood.

Revelation 8:10-11

Then the third angel blew; and there fell from the heavens a great star, burning like a torch. It fell upon a third of the rivers and upon the springs.

Revelation 14:7

and he cried in a loud voice-- 'Reverence God, and give him praise (for the hour of his Judgment has come) and worship him who made the heaven and the earth and the sea and all springs of water.'

Revelation 16:5

And I heard the Angel of the Waters saying-- 'Righteous art thou, thou who art and who wast, the Holy One, in inflicting this judgment;

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
Then the third angel blew; and there fell from the heavens a great star, burning like a torch. It fell upon a third of the rivers and upon the springs.