New Revised Standard Version
Do not add to his words, or else he will rebuke you, and you will be found a liar.

Contemporary English Version
Don't change what God has said! He will correct you and show that you are a liar.

New American Bible
Add nothing to his words, lest he reprimand you, and you be proved a liar.

Douay-Rheims Bible
Add not any thing to his words, lest thou be reproved and found a liar:

Add not any thing to his words, lest thou be reproved and found a liar:

add

Deuteronomy 4:2 You shall not add to the word that I speak to you, neither shall you take away from it: keep the commandments of the Lord your God which I command you.

Deuteronomy 12:32 What I command thee, that only do thou to the Lord: neither add any thing, nor diminish.

Revelation 22:18,19 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. . . .

and

Job 13:7-9 Hath God any need of your lie, that you should speak deceitfully for him? . . .

1 Corinthians 15:15 Yea, and we are found false witnesses of God: because we have given testimony against God, that he hath raised up Christ, whom he hath not raised up, if the dead rise not again.