śrī-nārada uvāca
natvā bhagavate 'jāya
lokānāṁ dharma-setave
vakṣye sanātanaṁ dharmaṁ
nārāyaṇa-mukhāc chrutam
śrī-nāradaḥ uvāca - Śrī Nārada Muni said; natvā - offering my obeisances; bhagavate - unto the Supreme Personality of Godhead; ajāya - ever existing, never born; lokānām - throughout the entire universe; dharma-setave - who protects religious principles; vakṣye - I shall explain; sanātanam - eternal; dharmam - occupational duty; nārāyaṇa-mukhāt - from the mouth of Nārāyaṇa; śrutam - which I have heard.
The word aja refers to Kṛṣṇa, who explains in Bhagavad-gītā (4.6), ajo ’pi sann avyayātmā: “I am ever existing, and thus I never take birth. There is no change in My existence.”