Mbh 6.91.1b

And he introduced himself to the high-souled Arjuna, saying, ‘I am Iravat, blessed be thou, and I am thy son, O lord’. And he reminded Arjuna of all the circumstances connected with the latter’s meeting with his mother. And thereupon the son of Pandu recollected all those circumstances exactly as they happened. Embracing his son then who resembled himself in accomplishments, Partha, in Indra’s abode, was filled with joy. The mighty-armed Iravat then, O king, in the celestial regions was, O Bharata, joyfully commanded by Arjuna, with regard to his own business, (in these words), ‘When the battle takes place, assistance should be rendered by thee’. Saying ‘Yes’, O lord, he went away. And now at the time of battle he presented himself, O king, accompanied with a large number of steeds of great fleetness and beautiful colour. And those steeds, decked with ornaments of gold, of various colours and exceeding fleetness, suddenly coursed over the field, O king, like swans on the bosom of the vast deep. And those steeds falling upon thine of exceeding swiftness, struck their chests and noses against those of thine. Afflicted by their own impetuous clash (against thine), they suddenly fell down, O king, on the earth. And in consequence of those steeds as also of thine occasioned by that clash, loud sounds were heard resembling what occurs at Garuda’s swoop. And the rider of those steeds, O king, thus dashing against one another in that battle, began to slay one another fiercely. And during that general engagement which was fierce and terrible, the chargers of both sides (escaping from press of battle) ran wildly away over the field. Weakened by one another’s shafts, brave warriors, with their horses killed under them, and themselves worn out with exertion, perished fast sabring one another.