Mbh 7.177.1c

That mace, coursed towards him like a flame of fire, and the cannibal struck it with a mace of his own, where-upon the latter (baffling the former) proceeded towards Bhima. Then, the son of Kunti covered that prince of Rakshasas, with showers of shafts. The Rakshasa, with his own keen shafts, baffled all those shafts of Bhima. Then all those Rakshasa warriors, of terrible forms, rallying and returning to battle, at the command of their leader, began to slay the elephants (of Bhima’s force). The Panchalas and the Srinjayas, the steeds and huge elephants (of Bhima’s army), exceedingly afflicted by the Rakshasas, became much agitated. Beholding that terrible battle (fought between Bhima and the Rakshasa), Vasudeva, that foremost of men addressing Dhananjaya, said these words, “Behold, the mighty-armed Bhima is succumbing to that prince of Rakshasas. Quickly proceed in Bhima’s wake, without thinking of anything else, O son of Pandu. Meanwhile, let Dhrishtadyumna and Sikhandin, and Yudhamanyu and Uttamaujas, these mighty car-warriors, uniting with the son of Draupadi, proceed against Karna. Let Nakula and Sahadeva and the valiant Yuyudhana, O son of Pandu, at thy command, slay the other Rakshasas! As regards thyself, O mighty armed one, do thou resist this division having Drona at its head. O thou of mighty arms, great is the danger that threatens us now.” After Krishna had said so, those foremost of car-warriors, as commanded, proceeded against Karna, the son of Vikartana, and against the other Rakshasas (fighting for the Kurus). Then with some shafts resembling snakes of virulent poison and sped from his bow drawn to its fullest stretch, the valiant prince of the Rakshasas cut off Bhima’s bow. The mighty cannibal next, in the very sight of Bhima, O Bharata, slew the latter’s steeds and driver with some whetted shafts. Steedless and driverless, Bhima, descending from the terrace of his car, uttered a loud roar and hurled a heavy mace at his foe.