Revelation 10:8-11

Revelation 10:8: “And the voice which I” [John] “heard from heaven spake unto me again, and said, Go and take the little book which is open in the hand of the angel which standeth upon the sea and upon the earth.”

Revelation 10:9: “And I” [John] “went unto the angel, and said unto him, Give me the little book. And he said unto me, Take it, and eat it up; and it shall make thy belly bitter, but it shall be in thy mouth sweet as honey.”

Revelation 10:10: “And I” [John] “took the little book out of the angel's hand, and ate it up; and it was in my mouth sweet as honey: and as soon as I had eaten it, my belly was bitter.”

Revelation 10:11: “And he” [The angel] “said unto me, Thou must prophesy again before many peoples, and nations, and tongues, and kings.” The angel's statement proves that John will be brought back before the second coming of Christ to prophesy.