Revelation 16:4-7 NLT

4 Then the third angel poured out his bowl on the rivers and springs, and they became blood.
5 And I heard the angel who had authority over all water saying, “You are just, O Holy One, who is and who always was, because you have sent these judgments.
6 Since they shed the blood of your holy people and your prophets, you have given them blood to drink. It is their just reward.”
7 And I heard a voice from the altar,a saying, “Yes, O Lord God, the Almighty, your judgments are true and just.”

References for Revelation 16:7

    • 16:7 - Greek I heard the altar.