Revelation 16:4-6

Murdock(i) 4 And the third angel poured his cup upon the rivers and the fountains of water; and they became blood. 5 And I heard the angel of the waters say: Righteous art thou, who art and who wast, and art holy; because thou hast done this judgment. 6 For they have shed the blood of saints and prophets; and thou hast given them blood to drink, for they deserve it.