Revelation 16:4-7 - The Third Bowl
4 And the third poured out his bowl into the rivers and the fountains of the waters; and it became blood. 5 And I heard the angel of the waters saying, Righteous art thou, who art and who wast, thou Holy One, because thou didst thus judge: 6 for they poured out the blood of the saints and the prophets, and blood hast thou given them to drink: they are worthy.
7 And I heard the altar saying, Yea, O Lord God, the Almighty, true and righteous are thy judgments.