Mbh 8.78.2c

All the great bowmen among the Dhartarashtras also, O best of men, applauded Karna, that foremost of great car-warriors, that first of all bowmen. Then Karna, O monarch, burnt the hostile army like a mighty and blazing conflagration consuming a heap of dry grass in the summer season. Thus slaughtered by Karna, the Pandava troops, struck with fear, fled in all directions, at the very sight of Karna. Loud wails arose there among the Pancalas in that great battle, while they were thus struck with the keen shafts sped from Karna's bow. Struck with fear at the noise, the vast host of the Pandavas, those enemies of Karna, regarded him as the one warrior in that battle. Then that crusher of foes, viz., the son of Radha, once more achieved an exceedingly wonderful feat, inasmuch as all the Pandavas, united together, were unable to even gaze at him. Like a swelling mass of water breaking when it comes in contact with a mountain, the Pandava army broke when it came in contact with Karna. Indeed, O king, the mighty-armed Karna in that battle, burning the vast host of the Pandavas, stood there like a blazing fire without smoke. With great activity that hero, with his shafts, cut off the arms and the heads of his brave foes, O king, and their ears decked with earrings. Swords with hilts of ivory, and standards, and darts, and steeds, and elephants, and cars of diverse kind, O king, and banners, and axles, and yokes, and wheels of many kinds, were cut off in various ways by Karna, observant of a warrior's vow. There, O Bharata, with elephants and steeds slain by Karna, the earth became impassable and miry with flesh and blood. The uneven and even spots also of the field, in consequence of slain horse and foot and broken cars and dead elephants, could no longer be distinguished. The combatants could not distinguish friends from foes in that thick darkness caused by shafts when Karna's (celestial) weapon was displayed.