Aṃśāvataraṇa-kathana (Catalog of Divine/Asuric Portions in Human Births) — Chapter 61
आशीविषै: कृष्णसर्प: सुप्तं चैनमदंशयत् | सर्वेष्वेवाड्गदेशेषु न ममार च शत्रुहा,एक दिन दुर्योधनने भीमसेनको सोते समय उनके सम्पूर्ण अंग-प्रत्यंगोंमें काले साँपोंसे डँसवा दिया, किंतु शत्रुधाती भीम मर न सके
Āśīviṣaiḥ kṛṣṇasarpaḥ suptaṃ cainam adaṃśayat | sarveṣv evāṅgadeśeṣu na mamāra ca śatruhā ||
Sinabi ni Vaiśampāyana: Ipinakagat ni Duryodhana kay Bhīmasena, habang siya’y natutulog, ang mga makamandag na itim na ahas sa buong katawan. Ngunit si Bhīma—tagapagpuksa ng kaaway—ay hindi namatay.
वैशम्पायन उवाच
The verse highlights the moral degradation of harming a sleeping, unsuspecting person through secret means; adharma may be attempted through deceit, but it does not necessarily succeed, and such acts deepen enmity and karmic consequence.
Duryodhana arranges for Bhīma, while asleep, to be bitten all over by venomous black snakes; despite this lethal attempt, Bhīma does not die, revealing his exceptional strength and setting the stage for further Kaurava hostility.