Revelation 16:4-6 NIV

4 The third angel poured out his bowl on the rivers and springs of water,1 and they became blood.2

References for Revelation 16:4

5 Then I heard the angel in charge of the waters say: "You are just in these judgments,3 you who are and who were,4 the Holy One,5 because you have so judged;6

References for Revelation 16:5

6 for they have shed the blood of your saints and prophets,7 and you have given them blood to drink8 as they deserve."

References for Revelation 16:6