Markandeya Purana 6.1

6.1

pakṣiṇa ūcuḥ
rāmaḥ pārthe parāṃ prītiṃ jñātvā kṛṣṇasya lāṅgalī /
cintayāmāsa bahudhā kiṃ kṛtaṃ sukṛtaṃ bhavet //

The birds spoke:
The plough-armed Rāma, knowing the perfect affection of Kṛṣṇa for Arjuna, deliberated much—“Can what has been done be better done? Without Kṛṣṇa, assuredly, I will not go near Duryodhana; or how, siding with the Pāṇḍavas, shall I slay king Duryodhana, my royal son-in-law and disciple? Therefore I will go neither to Arjuna nor to king Duryodhana. I will myself bathe myself at holy bathing places, so long as it conduces to the ending of the Kurus and Pāṇḍavas.”