And I heard the angel of the waters saying: "You are righteous, O Lord, The One who is and who was and who is to be, Because You have judged these things.
Revelation 16:5
Surrounding context
16:4 Then the third angel poured out his bowl on the rivers and springs of water, and they became blood.
16:5 And I heard the angel of the waters saying: "You are righteous, O Lord, The One who is and who was and who is to be, Because You have judged these things.
16:6 For they have shed the blood of saints and prophets, And You have given them blood to drink. For it is their just due."