John the Apostle
Revelation 14:2BSB·traditional attribution

And I heard a sound from heaven like the roar of many waters and the loud rumbling of thunder. And the sound I heard was like harpists strumming their harps.

Matthew Henry Presbyterian @wholebiblehenry

Here we have one of the most pleasing sights that can be viewed in this world - the Lord Jesus Christ at the head of his faithful adherents and attendants. Here observe, 1. How Christ appears: as a Lamb standing upon mount Zion. Mount Zion is the gospel church. Christ is with his church and in the midst of her in all her troubles, and therefore she is not consumed.

Commenting on Revelation 14:1-5

John Gill Reformed Baptist @doctorgill

And I heard a voice from heaven,.... The same with the voices heard in heaven upon the sounding of the seventh trumpet, Rev 11:15; as the voice of many waters; very loud, and uttered by a great multitude of people, signified by waters in this book, Rev 17:15; the same with those that praise the Lord for the destruction of antichrist, and for the marriage...

Albert Barnes Presbyterian @notesbybarnes

Verse 2. And I heard a voice from heaven. Showing that the scene is laid in heaven, but that John in the vision was on the earth. As the voice of many waters. As the sound of the ocean, or of a mighty cataract. That is, it was so loud that it could be heard from heaven to earth.