Mahabharata 12.38.5

वैशंपायन उवाच · vaiśaṃpāyana uvāca

तमुवाच महातेजा व्यासो वेदविदां वरःनारदं समभिप्रेक्ष्य सर्वं जानन्पुरातनम्

tamuvāca mahātejā vyāso vedavidāṃ varaḥnāradaṃ samabhiprekṣya sarvaṃ jānanpurātanam

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