Mbh 7.121.1c

Penetrating into the midst of the Pandava host in that battle, Drona began to crush their warriors by hundreds and thousands. And Drona, O king, proclaiming his name in that battle, caused a great carnage among the Pandavas, the Panchalas, and the Matsyas. The illustrious Viraketu, the son of the ruler of the Panchalas, rushed against the son of Bharadwaja who thus engaged in vanquishing the Pandava ranks. Piercing Drona with five straight shafts, that prince then pierced Drona’s standard with one shaft, and then his charioteer with seven. The sight that I then beheld, O monarch, in that battle, was exceedingly wonderful, inasmuch as Drona, though exerting himself vigorously could not approach the prince of the Panchalas. Then, O sire, the Panchalas, beholding Drona checked in battle, surrounded the latter on all sides, O king, from desire of king Yudhishthira’s victory. And those warriors then covered Drona along with showers of fiery shafts and strong lances and various other kinds of weapons, O king! Baffling then those dense showers of weapons by means of his own numerous shafts like the wind driving away from the welkin masses of clouds, Drona looked exceedingly resplendent. Then that slayer of hostile heroes (the son of Bharadwaja), aimed a fierce shaft endued with the effulgence of the sun or the fire, at the car of Viraketu. The shaft, O monarch, piercing through the prince of Panchala, quickly entered the earth, bathed in blood and blazing like a flame of fire. Then the prince of the Panchalas quickly fell down from his car, like a Champaka tree uprooted by the wind, falling down from a mountain summit. Upon the fall of that great bowman, that prince endued with great might, the Panchalas speedily encompassed Drona on every side.