Mahabharata 12.221.9

पुण्यकर्मभिराख्याता देवर्षिकथिताः कथाःचक्रतुस्तौ कथाशीलौ शुचिसंहृष्टमानसौपूर्ववृत्तव्यपेतानि कथयन्तौ समाहितौ

puṇyakarmabhirākhyātā devarṣikathitāḥ kathāḥcakratustau kathāśīlau śucisaṃhṛṣṭamānasaupūrvavṛttavyapetāni kathayantau samāhitau

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