Proverbs 29:19

19 Servants cannot be corrected by mere words; though they understand, they will not respond.

Read Proverbs 29:19 Using Other Translations

A servant will not be corrected by words: for though he understand he will not answer.
By mere words a servant is not disciplined, for though he understands, he will not respond.
Words alone will not discipline a servant; the words may be understood, but they are not heeded.