John the Apostle
Revelation 16:4BSB·traditional attribution

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

Matthew Henry Presbyterian @wholebiblehenry

We had in the foregoing chapter the great and solemn preparation that was made for the pouring out of the vials; now we have the performance of that work. Here observe, I. That, though every thing was made ready before, yet nothing was to be put in execution without an immediate positive order from God; and this he gave out of the temple, answering the...

Commenting on Revelation 16:1-7

John Gill Reformed Baptist @doctorgill

And the third angel poured his vial upon the rivers and fountains of waters,.... Which also is not to be literally understood of a stagnation of them, before the burning of the world; nor of the destruction of Popish fleets and navies, such as the Spanish armada in 1588, and others since; but rather of Popish writings, of the most learned and subtle men among...

Albert Barnes Presbyterian @notesbybarnes

Verse 4. And the third angel poured out his vial upon the rivers and fountains of waters. This coincides also with the account of the sounding of the third trumpet, (:) "And the third angel sounded, and there fell a great star from heaven burning as a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters." As...