Mbh 7.107.2a

“‘The Rakshasa Alamvusha in that battle, filled with rage, fought with the mighty Bhimasena, like Ravana’s son (Indrajit) with (Rama’s brother) Lakshmana. Beholding that Rakshasa and that human warrior engaged in fight, all creatures experienced both joy and wonder. Then Bhima, O king, laughing the while, pierced that wrathful prince of Rakshasa, viz., Rishyasringa’s son (Alamvusha), with nine keen shafts. Then that Rakshasa, thus pierced in battle, uttered a loud and awful sound, and rushed, with all his followers, against Bhima. Piercing Bhima then with five straight shafts, he quickly destroyed in that battle, thirty cars supporting Bhima. And once more destroying four hundred cars of Bhimasena, the Rakshasa pierced Bhimasena himself with winged arrows. Then the mighty Bhima deeply pierced by the Rakshasa, sat down on the terrace of his car, overcome by a swoon. The son of the Wind-god then, recovering his senses, became filled with rage. Drawing his excellent and terrible bow that was capable of bearing a great strain, he afflicted Alamvusha, in every part of his body, with keen shafts. Thereupon, the Rakshasa who resembled a huge mass of antimony, looked resplendent O king, like a flowering Kinsuka. Whilst being struck in that battle with those shafts sped from the bow of Bhima, the Rakshasa recollected the slaughter of his brother (Vaka) by the illustrious Pandava. Assuming then an awful form, he addressed Bhima, saying, “Wait a little in this battle, O Partha! Behold today my prowess. O thou of wicked understanding, that foremost of Rakshasas, viz., the mighty Vaka, was my brother. It is true he was slain by thee. But that took place out of my sight.” Having said these words unto Bhima, Alamvusha made himself invisible, and began to cover Bhimasena with a dense shower of arrows. Upon the disappearance of the Rakshasa, Bhima, O monarch, covered the welkin with straight shafts. Thus afflicted by Bhima, Alamvusha soon returned to his car.