Mahabharata 1.61.90
यस्तु नारायणो नाम देवदेवः सनातनःतस्यांशो मानुषेष्वासीद्वासुदेवः प्रतापवान्
yastu nārāyaṇo nāma devadevaḥ sanātanaḥtasyāṃśo mānuṣeṣvāsīdvāsudevaḥ pratāpavān
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book