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KJV - Behold, I come quickly: blessed is he that keepeth the sayings of the prophecy of this book.
ASV - And behold, I come quickly. Blessed is he that keepeth the words of the prophecy of this book.
BBE - See, I come quickly. A blessing on him who keeps the words of this book of the prophet.
WEB - "Behold, I come quickly. Blessed is he who keeps the words of the prophecy of this book."
YLT - Lo, I come quickly; happy `is' he who is keeping the words of the prophecy of this scroll.'