Mahabharata 12.268.3

भीष्म उवाच · bhīṣma uvāca

अत्राप्युदाहरन्तीममितिहासं पुरातनम्गीतं विदेहराजेन माण्डव्यायानुपृच्छते

atrāpyudāharantīmamitihāsaṃ purātanamgītaṃ videharājena māṇḍavyāyānupṛcchate

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