Add not any thing to his words, lest thou be reproved, and found a liar:
Add thou not unto his words, Lest he reprove thee, and thou be found a liar.
Add not to His words, lest He reprove you, and you be found a liar.
Don’t add to his words, or he will correct you and show you to be a liar.
Do not add anything to his words, lest you be reproved and be discovered to be a liar.