A.T. Robertson Commentary Revelation 22:9

"And he saith unto me, See thou do it not: I am a fellow-servant with thee and with thy brethren the prophets, and with them that keep the words of this book: worship God." — Revelation 22:9 (ASV)

See thou do it not (Hορα μη). The angel promptly interposes (λεγε, dramatic present). See 19:10 for discussion of this same phrase ορα μη when John had once before started to worship the angel in his excitement. Here we have added to the words in 19:10 "the prophets (των προφητων) and also "them which keep the words of this book" (των τηρουντων τους λογους του βιβλιου τουτου), the last a repetition from 22:7. In both places we have "Worship God" (τω θεω προσκυνησον). And not an angel.