Mahabharata 3.190.1

वैशंपायन उवाच · vaiśaṃpāyana uvāca

भूय एव ब्राह्मणमहाभाग्यं वक्तुमर्हसीत्यब्रवीत्पाण्डवेयो मार्कण्डेयम्

bhūya eva brāhmaṇamahābhāgyaṃ vaktumarhasītyabravītpāṇḍaveyo mārkaṇḍeyam

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