Mahabharata 14.16.9

श्रावितस्त्वं मया गुह्यं ज्ञापितश्च सनातनम्धर्मं स्वरूपिणं पार्थ सर्वलोकांश्च शाश्वतान्

śrāvitastvaṃ mayā guhyaṃ jñāpitaśca sanātanamdharmaṃ svarūpiṇaṃ pārtha sarvalokāṃśca śāśvatān

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