Revelation 22:9, 18
Revelation 22:9 NKJV
Then he said to me, “See that you do not do that. For I am your fellow servant, and of your brethren the prophets, and of those who keep the words of this book. Worship God.”
Revelation 22:18 NKJV
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