Mbh 8.90.1b

Beholding that terrible and awful passage-at-arms between those two heroes each of whom was desirous of availing himself of the other's lapses, all the other warriors on the field of battle became filled with wonder. The beings in the welkin, O king, applauded Karna and Arjuna. Indeed, many of them at a time, filled with joy, cheerfully shouted, sometimes saying, "Excellent, O Karna!" and sometimes saying, "Excellent, O Arjuna!" During the progress of that fierce encounter, while the earth was being pressed deep with the weight of cars and the tread of steeds and elephants, the snake Aswasena, who was hostile to Arjuna, was passing his time in the nether region. Freed from the conflagration at Khandava, O king, he had, from anger, penetrated through the earth (for going to the subterranean region). That brave snake, recollecting the death of his mother and the enmity he on that account harboured against Arjuna, now rose from the lower region. Endued with the power of ascending the skies, he soared up with great speed upon beholding that fight between Karna and Arjuna. Thinking that that was the time for gratifying his animosity towards, as he thought, the wicked-souled Partha, he quickly entered into Karna's quiver, O king, in the form of an arrow. At that time a net of arrows was seen, shedding its bright arrows around. Karna and Partha made the welkin one dense mass of arrows by means of their arrowy downpours. Beholding that wide-spread expanse of arrows, all the Kauravas and the Somakas became filled with fear. In that thick and awful darkness caused by arrows they were unable to see anything else. Then those two tigers among men, those two foremost of all bowmen in the world, those two heroes, fatigued with their exertions in battle, looked at each other. Both of them were then fanned with excellent and waving fans made of young (palm) leaves and sprinkled with fragrant sandal-water by many Apsaras staying in the welkin.