Mbh 7.188.2a

“‘Meanwhile, Drona and Arjuna, those two foremost of car-warriors, preceptor and pupil, both skilled in weapon, O monarch, fought with each other in battle, stupefying the eyes and minds of men with their lightness in the use of weapons and the sureness of their aim, and with the motions of their cars. Beholding that battle, the like of which had never been witnessed before, between preceptor and pupil, the other warriors abstained from fighting with each other and trembled. Each of those heroes, displaying beautiful revolutions of his car, wished to place the other on his right. The warriors present there beheld their prowess and became filled with wonder. Indeed, that great battle between Drona and the son of Pandu resembled that, O monarch, between a couple of hawks in the welkin for the sake of a piece of meat. Whatever feats Drona performed for vanquishing the son of Kunti, were all counteracted by Arjuna’s performing similar feats. When Drona failed to gain any ascendency over the son of Pandu, the son of Bharadwaja, that warrior acquainted with the course of all weapons, invoked into existence the Aindra, the Pasupata, the Tvashtra, the Vayavya, and the Yamya weapons. As soon as those weapons issued from Drona’s bow, Dhananjaya destroyed them quickly. When his weapons were thus duly destroyed by Arjuna with his own weapons, Drona shrouded the son of Pandu with the mightiest of celestial weapons. Every weapon, however, that Drona shot at Partha from desire of vanquishing the latter, was shot by Partha in return for baffling it. Seeing all his weapons, even the celestial ones, duly baffled by Arjuna, Drona applauded the latter in his heart. That chastiser of foes, O Bharata, regarded himself superior to every person in the world acquainted with weapons, in consequence of Arjuna having been his pupil.