Revelation 16:4 - 16:7
4 Then the third angel poured out his bowl into the rivers and the springs of waters, and they became blood. 5 And I heard the angel of the waters saying, “Righteous are You, who is and who was, O Holy One, because You judged these things; 6 for they poured out the blood of saints and prophets, and You have given them blood to drink. They deserve it.” 7 And I heard the altar saying, “Yes, O Lord God, the Almighty, true and righteous are Your judgments.”