Mahabharata 3.187.43
अभ्यन्तरं शरीरस्य प्रविष्टोऽसि यदा ममदृष्ट्वा लोकं समस्तं च विस्मितो नावबुध्यसे
abhyantaraṃ śarīrasya praviṣṭo'si yadā mamadṛṣṭvā lokaṃ samastaṃ ca vismito nāvabudhyase
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book