The words of a wise person’s mouth are gracious,
but the lips of a fool swallow him up. Bible see other translations

“the lips of a fool swallow him up.” The word picture that the “lips” of a fool “swallow him up” grabs our attention, but the meaning is clear. The words that come from a fool eat him up; they are self-destructive. The words of a fool cause him trouble in this life and the next. Thus, the Sage returns here to the benefits of wisdom, which has been a subject earlier in Ecclesiastes.

Commentary for: Ecclesiastes 10:12