Mahabharata 13.27.19

भीष्म उवाच · bhīṣma uvāca

अत्राप्युदाहरन्तीममितिहासं पुरातनम्शिलोञ्छवृत्तेः संवादं सिद्धस्य च युधिष्ठिर

atrāpyudāharantīmamitihāsaṃ purātanamśiloñchavṛtteḥ saṃvādaṃ siddhasya ca yudhiṣṭhira

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