Mbh 1.192.2b

--‘Mark, how I have counteracted that feat,’--those were the words--intelligible to heroes alone--in which they addressed each other. And incensed at finding the strength and energy of Arjuna’s arms unequalled on the earth, Karna, the son of Surya, fought with greater vigour. And parrying all those impetuous arrows shot at him by Arjuna, Karna sent up a loud shout. And this feat of his was applauded by all the warriors. Then addressing his antagonist, Karna said, ‘O thou foremost of Brahmanas, I am gratified to observe the energy of thy arms that knoweth no relaxation in battle and thy weapons themselves fit for achieving victory. Art thou the embodiment of the science of weapons, or art thou Rama that best of Brahmanas, or Indra himself, or Indra’s younger brother Vishnu called also Achyuta, who for disguising himself hath assumed the form of a Brahmana and mustering such energy of arms fighteth with me? No other person except the husband himself of Sachi or Kiriti, the son of Pandu, is capable of fighting with me when I am angry on the field of battle.’ Then hearing those words of his, Phalguna replied, saying, ‘O Karna, I am neither the science of arms (personified), nor Rama endued with superhuman powers. I am only a Brahmana who is the foremost of all warriors and all wielders of weapons. By the grace of my preceptor I have become accomplished in the Brahma and the Paurandara weapons. I am here to vanquish thee in battle. Therefore, O hero, wait a little.’