Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 28
Sanskrit:
श्रुतमेतन्मया पूर्वं ज्ञानं विज्ञानसंयुतम् ।धर्मं भागवतं शुद्धं नारदाद्देवदर्शनात् ॥ २८ ॥
ITRANS:
śrutam etan mayā pūrvaṁjñānaṁ vijñāna-saṁyutamdharmaṁ bhāgavataṁ śuddhaṁnāradād deva-darśanāt
Translation:
Prahlāda Mahārāja continued: I received this knowledge from the great saint Nārada Muni, who is always engaged in devotional service. This knowledge, which is called bhāgavata-dharma, is fully scientific. It is based on logic and philosophy and is free from all material contamination.