Bede

And the mouth of fools pours out folly. By perversely understanding the words of sacred Scripture, and by preferring their own interpretations over its authority. It can also be understood about the philosophers of the pagans, as he says, The mouth of fools pours out folly; such as Porphyry and Julian, who spewed out their streams of folly against the doctors of the Church.

Commentary on Proverbs ↗