Ecclesiastes 7:21 in the King James Version
Also take no heed unto all words that are spoken; lest thou hear thy servant curse thee:
Context
20 Surely there is not a righteous man on earth who does good and doesn’t sin.
21 Also don’t take heed to all words that are spoken, lest you hear your servant curse you;
22 for often your own heart knows that you yourself have likewise cursed others.