Mahabharata Drona Parva Chapter 179:3

Mahabharata Drona Parva (Ghatotkacha-badha Parva) Chapter 179:3 And, O king, the (Kaurava) warriors beholding the yelling Rakshasas, became exceedingly distressed. Those terrible Rakshasas with fiery tongues and blazing mouths and sharp teeth, and with forms huge as hills, stationed in the welkin, with darts in grasp looked like clouds pouring torrents of rain. Struck and crushed with those fierce shafts and darts and lances and maces and spiked clubs of blazing splendour, and thunder-bolts and Pinakas and Asanis and discs and Sataghnis, the (Kaurava) troops began to fall down. The Rakshasas began to pour upon the warriors of thy son long darts, and treacle and Sataghnis, and Sthunas made of black iron and twined with strings of jute. Then all the combatants became stunned. Brave warriors, with weapons broken or loosened from their grasp, or deprived of heads, or with fractured limbs began to fall down on the field. And in consequence of the falling rocks, steeds and elephants and cars began to be crushed. Those Yatudhanas of terrible forms created by Ghatotkacha with the aid of his powers of illusion pouring that thick shower of mighty weapons spared neither those that were terrified nor those that begged for quarter. During that cruel carnage of Kuru heroes, brought on by Death himself, during that extermination of Kshatriyas the Kaurava warriors suddenly broke and fled with speed, crying aloud, "Fly, ye Kauravas! All is lost! The gods Indra at their head are slaying us for the sake of the Pandavas!" At that time there was none that could rescue the sinking Bharata troops. During that fierce uproar and rout and extermination of the Kauravas, the camps losing their distinctive features, the parties could not be distinguished from each other. Indeed, during that terrible rout in which the soldiers showed no regard for one another, every side of the field, when looked at, seemed to be empty. Only Karna, O king, could be seen there, drowned in that shower of weapons. Then Karna covered the welkin with his shafts, contending with that celestial illusion of the Rakshasa. The Suta's son, endued with modesty and achieving the most difficult and noble feats, did not lose his senses in that battle. Then, O king, all the Saindhavas and Valhikas affrightedly looked at Karna who kept his senses in that fight. And they all worshipped him, while they looked at the triumph of the Rakshasa. Then a Sataghni equipped with wheels, hurled by Ghatotkacha, slew the four steeds of Karna simultaneously. These dropped down on the ground, on their knees, deprived of life, teeth, eyes, and tongues. Then jumping down from his steedless car and seeing the Kauravas flying away, and beholding his own celestial weapon baffled by the Rakshasa illusion, Karna, without losing his senses, turned his mind inwards and began to reflect on what he should next do. At that time all the Kauravas, beholding Karna and that terrible illusion (of the Rakshasa) cried out saying, "O Karna, slay the Rakshasa soon with thy dart. These Kauravas and the Dhartarashtras are on the point of being annihilated.