Mahabharata 12.117.1

भीष्म उवाच · bhīṣma uvāca

अत्राप्युदाहरन्तीममितिहासं पुरातनम्निदर्शनकरं लोके सज्जनाचरितं सदा

atrāpyudāharantīmamitihāsaṃ purātanamnidarśanakaraṃ loke sajjanācaritaṃ sadā

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