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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
श्रुतमेतन्मया पूर्वं ज्ञानं विज्ञानसंयुतम् । धर्मं भागवतं शुद्धं नारदाद्देवदर्शनात्
śrutametanmayā pūrvaṃ jñānaṃ vijñānasaṃyutam | dharmaṃ bhāgavataṃ śuddhaṃ nāradāddevadarśanāt
SB 7.6.28