'Words of This Book' in the Bible

“Look, I am coming quickly! The one who keeps the prophetic words of this book is blessed.”

But he said to me, “Don’t do that! I am a fellow slave with you, your brothers the prophets, and those who keep the words of this book. Worship God.”

He also said to me, “Don’t seal the prophetic words of this book, because the time is near.

I testify to everyone who hears the prophetic words of this book: If anyone adds to them, God will add to him the plagues that are written in this book.