Mahabharata 12.321.8

नारायणो हि विश्वात्मा चतुर्मूर्तिः सनातनःधर्मात्मजः संबभूव पितैवं मेऽभ्यभाषत

nārāyaṇo hi viśvātmā caturmūrtiḥ sanātanaḥdharmātmajaḥ saṃbabhūva pitaivaṃ me'bhyabhāṣata

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