Revelation 16:3 (KJV)

And I heard a great voice out of the temple saying to the seven angels, Go your ways, and pour out the vials of the wrath of God upon the earth.

And the first went, and poured out his vial upon the earth; and there fell a noisome and grievous sore upon the men which had the mark of the beast, and upon them which worshipped his image.

And the third angel poured out his vial upon the rivers and fountains of waters; and they became blood.

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.

For they have shed the blood of saints and prophets, and thou hast given them blood to drink; for they are worthy.

And I heard another out of the altar say, Even so, Lord God Almighty, true and righteous are thy judgments.

And the fourth angel poured out his vial upon the sun; and power was given unto him to scorch men with fire.