NASB 1995
I testify to everyone who hears the words of the prophecy of this book: if anyone adds to them, God will add to him the plagues which are written in this book;

American Standard Version
I testify unto every man that heareth the words of the prophecy of this book, if any man shall add unto them, God shall add unto him the plagues which are written in this book:

Berean Study Bible
I testify to everyone who hears the words of prophecy in this book: If anyone adds to them, God will add to him the plagues described in this book.

Douay-Rheims Bible
For I testify to every one that heareth the words of the prophecy of this book: If any man shall add to these things, God shall add unto him the plagues written in this book.

English Revised Version
I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto them, God shall add unto him the plagues which are written in this book:

King James Bible
For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:

World English Bible
I testify to everyone who hears the words of the prophecy of this book, if anyone adds to them, may God add to him the plagues which are written in this book.

Young's Literal Translation
'For I testify to every one hearing the words of the prophecy of this scroll, if any one may add unto these, God shall add to him the plagues that have been written in this scroll,

Revelation 22:18 Additional Translations ...