The fifth incarnation, named Lord Kapila, is foremost among perfected beings. He gave an exposition of the creative elements and metaphysics to Āsuri Brāhmaṇa, for in course of time this knowledge had been lost.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
पञ्चमः कपिलो नाम सिद्धेशः कालविप्लुतम् । प्रोवाचासुरये साङ्ख्यं तत्त्वग्रामविनिर्णयम्
pañcamaḥ kapilo nāma siddheśaḥ kālaviplutam | provācāsuraye sāṅkhyaṃ tattvagrāmavinirṇayam
SB 1.3.10