Mahabharata 12.113.13

यदा त्वबुध्यतात्मानं भक्ष्यमाणं स वै पशुःतदा संकोचने यत्नमकरोद्भृशदुःखितः

yadā tvabudhyatātmānaṃ bhakṣyamāṇaṃ sa vai paśuḥtadā saṃkocane yatnamakarodbhṛśaduḥkhitaḥ

Our plain-language meaning of this verse is waiting for scholar review.