Mbh 4.58.1

Vaisampayana said, “After Kripa had thus been taken away, the invincible Drona of red steeds, taking up his bow to which he had already stringed an arrow, rushed towards Arjuna of white steeds. And beholding at no great distance from him the preceptor advancing on his golden car, Arjuna that foremost of victorious warriors, addressing Uttara, said, ‘Blessed be thou, O friend, carry me before that warrior on whose high banner-top is seen a golden altar resembling a long flame of fire and decked with numerous flags placed around, and whose car is drawn by steeds that are red and large, exceedingly handsome and highly-trained, of face pleasant and of quiet mien, and like unto corals in colour and with faces of coppery hue, for that warrior is Drona with whom I desire to fight. Of long arms and endued with mighty energy possessed of strength and beauty of person, celebrated over all the worlds for his prowess, resembling Usanas himself in intelligence and Vrihaspati in knowledge of morality, he is conversant with the four Vedas and devoted to the practice of Brahmacharya virtues. O friend, the use of the celestial weapons together with the mysteries of their withdrawal and the entire science of weapons, always reside in him. Forgiveness, self-control, truth, abstention from injury, rectitude of conduct,--these and countless other virtues always dwell in that regenerate one. I desire to fight with that highly-blessed one on the field. Therefore, take me before the preceptor and carry me thither, O Uttara.’”