Mbh 8.51.2b

Loud cries of woe then, O ruler of men, arose there when those heroic sons of thine, all great bowmen, were being thus slaughtered. When those troops were once more agitated, the mighty Bhima, O monarch, then despatched Nanda and Upananda in that battle to Yama's abode. Thereupon thy sons, exceedingly agitated and inspired with fear, fled away, seeing that Bhimasena in that battle behaved like the Destroyer himself at the end of the Yuga. Beholding those sons of thine slain, the Suta's son with a cheerless heart once more urged his steeds of the hue of swans to that place where the son of Pandu was. Those steeds, O king, urged on by the ruler of Madras, approached with great speed the car of Bhimasena and mingled in battle. The collision, O monarch, that once more took place between Karna and the son of Pandu in battle, became, O king, exceedingly fierce and awful and fraught with a loud din. Beholding, O king, those two mighty car-warriors close with each other, I became very curious to observe the course of the battle. Then Bhima, boasting of his prowess in battle, covered Karna in that encounter, O king, with showers of winged shafts in the very sight of thy sons. Then Karna, that warrior acquainted with the highest of weapons, filled with wrath, pierced Bhima with nine broad-headed and straight arrows made entirely of iron. Thereupon the mighty-armed Bhima of terrible prowess, thus struck by Karna, pierced his assailant in return with seven shafts sped from his bow-string drawn to his ear. Then Karna, O monarch, sighing like a snake of virulent poison, shrouded the son of Pandu with a thick shower of arrows. The mighty Bhima also, shrouding that mighty car-warrior with dense arrowy downpours in the very sight of the Kauravas, uttered a loud shout. Then Karna, filled with rage, grasped his strong bow and pierced Bhima with ten arrows whetted on stone and equipped with Kanka feathers.