John the Apostle
Revelation 22:7ESV·traditional attribution

“And behold, I am coming soon. Blessed is the one who keeps the words of the prophecy of this book.”

Matthew Henry Presbyterian @wholebiblehenry

We have here a solemn ratification of the contents of this book, and particularly of this last vision (though some think it may not only refer to the whole book, but to the whole New Testament, yea, to the whole Bible, completing and confirming the canon of scripture); and here, 1.

Commenting on Revelation 22:6-19

John Gill Reformed Baptist @doctorgill

Behold, I come quickly,.... These are the words not of the angel, but of Christ, as is manifest from Rev 22:12 and which are to be understood not of Christ's coming in his power to destroy Jerusalem, for this was past when John had these visions, and wrote this book; but of the second and personal coming of Christ to judgment, as is clear from...

Albert Barnes Presbyterian @notesbybarnes

Verse 7. Behold, I come quickly. . The words here used are undoubtedly the words of the Redeemer, although they are apparently repeated by the angel. The meaning is, that they were used by the angel as the words of the Redeemer. See . Blessed is he that keepeth the sayings of the prophecy of this book.