‏ Revelation of John 22:18-19

18I warn everyone who hears the words of the prophecy of this book: aif anyone adds to them, God will add to him the plagues described in this book, 19and if anyone takes away from the words of the book of this prophecy, God will take away his share in bthe tree of life and in cthe holy city, which are described in this book.

Copyright information for ESV