Ecclesiastes 7:21

21 Do not pay attention to every word people say, or you may hear your servant cursing you—

Read Ecclesiastes 7:21 Using Other Translations

Also take no heed unto all words that are spoken; lest thou hear thy servant curse thee:
Do not take to heart all the things that people say, lest you hear your servant cursing you.
Don’t eavesdrop on others—you may hear your servant curse you.