Revelation 22:18-19

For I testify to everyone who hears the words of the prophecy of this book:  if anyone adds to these things, God will add to him the plagues that are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book.

• ·        This is another section at the end of the Book of Revelation where it is hard to tell exactly who speaks. In most red-letter editions, these words are in black, indicating that the translators believe that these are not the words of Jesus. But there may be good reason to believe Jesus gave this warning.  (DG)

• ·        "The solemnity of the injunction suggests that the speaker is Christ Himself." (Mounce)

• ·        This means that there is a high price to pay for tampering with the Book of Revelation specifically, and the Scriptures in general. (DG)

Deuteronomy 4:2  You shall not add to the word which I command you, nor take from it, that you may keep the commandments of the LORD your God which I command you.

Proverbs 30:6  Do not add to His words.  Lest He rebuke you, and you be found a liar.