Mahabharata 3.196.1

वैशंपायन उवाच · vaiśaṃpāyana uvāca

ततो युधिष्ठिरो राजा मार्कण्डेयं महाद्युतिम्पप्रच्छ भरतश्रेष्ठो धर्मप्रश्नं सुदुर्वचम्

tato yudhiṣṭhiro rājā mārkaṇḍeyaṃ mahādyutimpapraccha bharataśreṣṭho dharmapraśnaṃ sudurvacam

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