And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book. (Revelation 22:19)
The one who takes away from the words of the Revelation is equally guilty with the one who adds to the words (see on v. 18).
Take away his part.
The guilty one in this case will suffer three major losses: (1) the loss of immortality, and the consequent suffering of eternal death; (2) loss of any part in the corporate life of the city of the new earth; (3) loss of all the blessings and promises of the Revelation. A complete and staggering loss is here presented that nothing in this life can even remotely compensate for.