Aṃśāvataraṇa-kathana (Catalog of Divine/Asuric Portions in Human Births) — Chapter 61
बीभत्सुर्वासुदेवेन सहितो नृपसत्तम । नातिभारो हि पार्थस्य केशवेन सहाभवत्
bībhatsur vāsudevena sahito nṛpasattama | nātibhāro hi pārthasya keśavena sahābhavat ||
হে নৃপশ্ৰেষ্ঠ! বাসুদেৱ (শ্ৰীকৃষ্ণ) সহিত থাকোঁতে বীভৎসু অৰ্জুনৰ বাবে সেই কাৰ্য অতিভাৰ নাছিল; কেশৱ কাষত থাকিলে পাৰ্থৰ ওপৰত ভাৰ অধিক নহয়।
वैशम्पायन उवाच
A difficult duty becomes bearable and rightly executed when one is supported by wise, dharmic guidance—here symbolized by Arjuna’s strength being steadied by Kṛṣṇa’s presence.
The narrator notes that Arjuna, traveling/acting together with Kṛṣṇa, did not experience the undertaking as an excessive burden; Kṛṣṇa’s companionship makes the task manageable.