Mahabharata 5.140.1

संजय उवाच · saṃjaya uvāca

कर्णस्य वचनं श्रुत्वा केशवः परवीरहाउवाच प्रहसन्वाक्यं स्मितपूर्वमिदं तदा

karṇasya vacanaṃ śrutvā keśavaḥ paravīrahāuvāca prahasanvākyaṃ smitapūrvamidaṃ tadā

Our plain-language meaning of this verse is waiting for scholar review.