Mbh 8.41.3b

Having caused the crow whose senses had deserted him to ride upon his back, the swan quickly returned to that island whence they had both flown, challenging each other. Placing down that ranger of the sky on dry land and comforting him, the swan, fleet as the mind, proceeded to the region he desired. Thus was that crow, fed on the remains of others' dinners, vanquished by the swan. The crow, then, casting off the pride of might and energy, adopted a life of peace and quiet. Indeed, even, as that crow, fed upon the remains of the dinners of the Vaishya children, disregarded his equals and superiors, so dost thou, O Karna, that art fed by the sons of Dhritarashtra upon the remains of their dishes, disregard all thy equals and superiors. Why didst thou not slay Partha at Virata's city when thou hadst the advantage of being protected by Drona and Drona's son and Kripa and Bhishma and the other Kauravas? There where, like a pack of jackals defeated by a lion, ye all were defeated with great slaughter by the diadem-decked Arjuna, what became of your prowess? Beholding also thy brother slain by Savyasaci, in the very sight of the Kuru heroes, it was thou that didst fly away first. By the skirts also of the dvaitya lake, O Karna, when thou wert assailed by the Gandharvas, it was thou that, deserting all the Kurus, didst first run away. Having vanquished in battle the Gandharvas headed by Citrasena, with great slaughter, it was Partha, O Karna, that liberated Duryodhana with his wife. Rama himself, O Karna, before the kings in the (Kuru) assembly spake of the great prowess of both Partha and Keshava. Thou didst frequently hear the words of Drona and Bhishma, speaking in the presence of all the kings, that the two Krishnas are unslayable. I have told thee a little only regarding those matters in which Dhananjaya is superior to thee like the Brahmana who is superior to all created beings.