In the body of a deer, Bharata Mahārāja began to lament: What misfortune! I have fallen from the path of the self-realized. I gave up my real sons, wife and home to advance in spiritual life, and I took shelter in a solitary holy place in the forest. I became self-controlled and self-realized, and I engaged constantly in devotional service — hearing, thinking, chanting, worshiping and remembering the Supreme Personality of Godhead, Vāsudeva. I was successful in my attempt, so much so that my mind was always absorbed in devotional service. However, due to my personal foolishness, my mind again became attached — this time to a deer. Now I have obtained the body of a deer and have fallen far from my devotional practices.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अहो कष्टं भ्रष्टोऽहमात्मवतामनुपथाद्यद्विमुक्त- समस्तसङ्गस्य विविक्तपुण्यारण्यशरणस्यात्मवत आत्मनि सर्वेषामात्मनां भगवति वासुदेवे तदनुश्रवणमननसङ्कीर्तनाराधनानुस्मरणा- भियोगेनाशून्यसकलयामेन कालेन समावेशितं समाहितं कार्त्स्न्येन मनस्तत्तु पुनर्ममाबुधस्या- रान्मृगसुतमनु परिसुस्राव
aho kaṣṭaṃ bhraṣṭo'hamātmavatāmanupathādyadvimukta- samastasaṅgasya viviktapuṇyāraṇyaśaraṇasyātmavata ātmani sarveṣāmātmanāṃ bhagavati vāsudeve tadanuśravaṇamananasaṅkīrtanārādhanānusmaraṇā- bhiyogenāśūnyasakalayāmena kālena samāveśitaṃ samāhitaṃ kārtsnyena manastattu punarmamābudhasyā- rānmṛgasutamanu parisusrāva
SB 5.8.29