Mahabharata 12.342.8

भीष्म उवाच · bhīṣma uvāca

सोऽतिथिर्वचनं तस्य श्रुत्वा धर्माभिलाषिणःप्रोवाच वचनं श्लक्ष्णं प्राज्ञो मधुरया गिरा

so'tithirvacanaṃ tasya śrutvā dharmābhilāṣiṇaḥprovāca vacanaṃ ślakṣṇaṃ prājño madhurayā girā

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