And the third angel poured out his vial upon the rivers and fountains of waters; and they became blood. — Revelation 16:4
And I heard the angel of the waters say, Thou art righteous, O Lord, which art, and wast, and shalt be, because thou hast judged thus. — Revelation 16:5
For they have shed the blood of saints and prophets, and Thou hast given them blood to drink: for they are worthy. — Revelation 16:6
And I heard another out of the alter say, Even so, Lord God Almighty, true and righteous are Thy judgments. — Revelation 16:7