Mahabharata 5.48.20
एष नारायणः कृष्णः फल्गुनस्तु नरः स्मृतःनारायणो नरश्चैव सत्त्वमेकं द्विधाकृतम्
eṣa nārāyaṇaḥ kṛṣṇaḥ phalgunastu naraḥ smṛtaḥnārāyaṇo naraścaiva sattvamekaṃ dvidhākṛtam
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book