Mahabharata 12.316.5

नारद उवाच · nārada uvāca

तत्त्वं जिज्ञासतां पूर्वमृषीणां भावितात्मनाम्सनत्कुमारो भगवानिदं वचनमब्रवीत्

tattvaṃ jijñāsatāṃ pūrvamṛṣīṇāṃ bhāvitātmanāmsanatkumāro bhagavānidaṃ vacanamabravīt

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