Mahabharata Drona Parva Chapter 102:3

Mahabharata Drona Parva (Jayadratha-Vadha Parva) Chapter 102:3 Slain, or in the act of being slain, those failed to reach the excellent car. Indeed, the car on which Arjuna rode, stood motionless full two miles from the besieging force on every side. Then the Vrishni hero (Krishna), without taking any time, said unto Arjuna these words: "Draw thy bow quickly and with great force, for I will blow my conch." Thus addressed, Arjuna drawing his bow Gandiva with great force, began to slaughter the foe, shooting dense showers of shafts and making a loud noise by stretching the bowstring with his fingers. Kesava meanwhile forcibly and very loudly blew his conch Panchajanya, his face covered with dust. In consequence of the blare of that conch and of the twang of Gandiva, the Kuru warriors, strong or weak, all fell down on the ground. The car of Arjuna then freed from that press, looked resplendent like a cloud driven by the wind. (Beholding Arjuna) the protectors of Jayadratha, with their followers, became filled with rage. Indeed, those mighty bowmen, the protectors of the ruler of Sindhus, suddenly beholding Partha, uttered loud shouts, filling the earth with that noise. The whiz of their arrows were mingled with other fierce noises and the loud blare of their conchs. Those high-souled warriors uttered leonine shouts. Hearing that awful uproar raised by thy troops, Vasudeva and Dhananjaya blew their conchs. With their loud blare (of their conchs), the whole earth, with her mountains and seas and islands and the nether regions, O monarch, seemed to be filled. Indeed, that blare, O best of Bharatas, filled all the points of the compass, and was echoed back by both the armies. Then thy car-warriors, beholding Krishna and Dhananjaya, became very much frightened. Soon, however, they recovered and put forth their activity. Indeed, the great car-warriors of thy host, beholding the two Krishnas, those highly blessed persons, cased in mail rushed towards. The sight thus presented became a wonderful one.