Revelation 16:4-7 - The Third Bowl
4 And the third poured out his bowl into the rivers and springs of waters; and they were turned into blood. 5 And I heard the angel of the waters saying. "Righteous art thou, thou who art and wast, The Holy One, Because thou didst inflict this judgment. 6 For men poured out the blood of thy saints and prophets, And thou hast given them blood to drink. And this they deserved."
7 And I heard the altar saying, "Yea, O Lord, the Almighty, True and righteous are thy judgments."