Revelation 16:4-7 - The Third Bowl
4 And the third poured out his bowl on the rivers and the fountains of waters; and they became blood. 5 And I heard the angel of the waters say, Thou art just, the Is and the Was, [the] Holy One, because thou hast judged thus, 6 for they shed the blood of saints and prophets, and thou hast given them blood to drink; they are worthy.
7 And I heard the altar say, Yes, Lord God Almighty, true and righteous are thy judgments.