Mbh 3.86.1a

“Vaisampayana continued, ‘Having ascertained the opinion of his brothers, and of the intelligent Narada, king Yudhishthira, addressing Dhaumya, who was like unto the Grandsire himself, said, ‘I have for the acquisition of arms, sent away that tiger among men, Jishnu, whose prowess is incapable of being baffled, and who is possessed of long arms and immeasurable intelligence. O thou of ascetic wealth, that hero is devoted to me, endued with ability, and well-skilled in weapons, and like unto the exalted Vasudeva himself. I know them both, Krishna and Arjuna, those destroyers of enemies, O Brahmana, endued with prowess, even as the puissant Vyasa knoweth them. I know Vasudeva and Dhananjaya to be none else than Vishnu himself, possessed of the six attributes. And this is also what Narada knoweth, for he hath always spoken so unto me. I also know them to be Rishis, Nara and Narayana. Knowing him to possess the ability, I have sent him (on the mission). Not inferior unto Indra and fully competent (for the task), I have sent that son of a god to see the lord of the celestials and obtain weapons from him. Bhishma and Drona are Atirathas. Kripa and the son of Drona are invincible; these mighty warriors have been installed by Dhritarashtra’s son in the command of his army. All these are versed in the Vedas, are heroic, and possessed of the knowledge of every weapon. Endued with great strength, these always desire to encounter Arjuna in fight. And Karna also of the Suta caste is a mighty warrior versed in celestial weapons. In respect of the impetus of his weapons, he is endued with the strength of the Wind-god. Himself like a flame of fire, the arrows (proceeding from him) constitute its tongues. The slaps of his left hand cased in leathern fence constitute the crackling of that flame. The dust of the battle-field is its smoke.