Revelation 22:18-19

18I testify and warn everyone who hears the words of the prophecy of this book [its predictions, consolations, and admonitions]: if anyone adds [anything] to them, God will add to him the plagues (afflictions, calamities) which are written in this book;

19and if anyone takes away from or distorts the words of the book of this prophecy, God will take away [from that one] his share from the tree of life and from the holy city (new Jerusalem), which are written in this book.