Revelation 16:4

An Understandable Version (2005 edition)

And [then] the third [angel] poured out his bowl into the rivers and springs of water, and they turned into blood.

Cross References

Revelation 11:6

These witnesses have the authority to shut the sky up so that it does not rain during the time they are prophesying. And they have the authority to turn the waters into blood, and to strike the earth with every kind of plague whenever they want to.

Revelation 14:7

And he said [to them] in a loud voice, “Fear God and honor Him, for the time has come for Him to judge people. Worship Him who made the heaven, the earth, the ocean and the springs of water.”

Revelation 16:5

Then I heard the angel [in charge] of the waters saying, “You are just, [you] who are [in the present] and who were [in the past], O Holy One, because you have judged [that these things should happen].