John the Apostle
Revelation 17:15BSB·traditional attribution

Then the angel said to me, “The waters you saw, where the prostitute was seated, are peoples and multitudes and nations and tongues.

Matthew Henry Presbyterian @wholebiblehenry

Here we have some account of the downfall of Babylon, to be more fully described in the following chapter. I. Here is a war begun between the beast and his followers, and the Lamb and his followers. The beast and his army, to an eye of sense, appear much stronger than the Lamb and his army: one would think an army with a lamb at...

Commenting on Revelation 17:14-18

John Gill Reformed Baptist @doctorgill

And he saith unto me,.... That is, the angel, who proposed to give John the interpretation of the vision, he went on with it as follows: the waters which thou sawest, where the whore sitteth; see Gill on Rev 17:1, are peoples, and multitudes, and nations, and tongues; denoting the vast multitude of people, of which the several kingdoms, of divers languages, consist, which belong...

Albert Barnes Presbyterian @notesbybarnes

Verse 15. And he saith unto me. The angel, . This commences the more literal statement of what is meant by these symbols. The waters which thou sawest. . Are peoples, and multitudes, and nations, and tongues. For an explanation of these terms, . The meaning here is, (a) that these waters represent a multitude of people.