Mahabharata 12.28.2

व्यास उवाच · vyāsa uvāca

अत्राप्युदाहरन्तीममितिहासं पुरातनम्अश्मगीतं नरव्याघ्र तन्निबोध युधिष्ठिर

atrāpyudāharantīmamitihāsaṃ purātanamaśmagītaṃ naravyāghra tannibodha yudhiṣṭhira

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