These first two verses are very scary warnings from God that we should not add to nor take away any of His words that are in His Preserved Holy Word, the King James Bible.
Revelation
22:18 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:
22:19 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.
Deuteronomy 4:2
Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the LORD your God which I command you.
Proverbs 30:6
Add thou not unto his words, lest he reprove thee, and thou be found a liar.
