Revelation 22:9, 18

But he said, “No, don’t worship me. I am a servant of God, just like you and your brothers the prophets, as well as all who obey what is written in this book. Worship only God!”

And I solemnly declare to everyone who hears the words of prophecy written in this book: If anyone adds anything to what is written here, God will add to that person the plagues described in this book.