Revelation 16:4-7 NRS

4 The third angel poured his bowl into the rivers and the springs of water, and they became blood.
5 And I heard the angel of the waters say, "You are just, O Holy One, who are and were, for you have judged these things;
6 because they shed the blood of saints and prophets, you have given them blood to drink. It is what they deserve!"
7 And I heard the altar respond, "Yes, O Lord God, the Almighty, your judgments are true and just!"