Mbh 7.161.1c

Then, O Bharata, with four other shafts he speedily despatched the four excellent steeds of the Kuru warrior to Yama’s presence. And then that tiger among car-warriors with another straight shaft, smiling the while, cut off from his trunk the head of Somadatta’s driver. Then he sought at Somadatta himself a terrible shaft of fiery effulgence, whetted on stone, steeped in oil, and equipped with wings of gold. That excellent and fierce shaft, shot by the mighty grandson of Sini, quickly fell like a hawk, O Lord, upon the chest of Somadatta. Deeply pierced by the mighty Satwata, the great car-warrior Somadatta, O monarch, fell down (from his car) and expired. Beholding the great car-warrior Somadatta slain there, thy warriors with a large throng of cars rushed against Yuyudhana. Meanwhile, the Pandava also, O king, with all the Prabhadrakas and accompanied by a large force, rushed against Drona’s army. Then Yudhishthira, excited with wrath, began, with his shafts, to strike and rout the troops of Bharadwaja’s son at the very sight of the latter. Beholding Yudhishthira thus agitating his troops, Drona, with eyes red in wrath, furiously rushed against him. The preceptor, then pierced the son of Pritha with seven keen arrows. Yudhishthira, in return, excited with wrath, pierced the preceptor with five arrows. Deeply pierced by the son of Pandu, the mighty bowman (Drona), licking the corners of his mouth for a moment, cut off both the standard and the bow of Yudhishthira. With great speed, at a time when speed was of the utmost consequence, that best of kings, whose bow had been cut off, took up another bow that was sufficiently tough and hard. The son of Pandu then pierced Drona with his steeds, driver, standard, and car, with a thousand arrows. All this seemed exceedingly wonderful. Afflicted with the strokes of those arrows and feeling great pain, Drona, that bull among Brahmanas, sat down for a while on the terrace of his car.