Revelation 16:4-6

Living Bible

⁴ The third angel poured out his flask upon the rivers and springs and they became blood. ⁵ And I heard this angel of the waters declaring, “You are just in sending this judgment, O Holy One, who is and was, ⁶ for your saints and prophets have been martyred and their blood poured out upon the earth; and now, in turn, you have poured out the blood of those who murdered them; it is their just reward.”