Mbh 8.36.2a

"Sanjaya continued, 'When the morning came, O monarch, Duryodhana once more addressed the ruler of the Madras endued with great activity, saying, "O ruler of the Madras, hold the reins in battle of Karna's foremost of steeds. Protected by thee, the son of Radha will vanquish Dhananjaya." Thus addressed, Shalya, answering, "So be it" ascended the car, O Bharata. When Shalya approached that car, Karna with a cheerful heart addressed his driver, saying, "O charioteer, quickly equip the car for me." Having duly equipped that triumphal car, the foremost of its kind, which resembled the vapoury mansions in the sky, Shalya presented it to Karna, saying, "Blessed be thou, victory to thee." Then Karna, that foremost of car-warriors, duly worshipping that car which had in days of old been sanctified by a priest conversant with Brahma, and circumambulating it and carefully adoring the god Surya addressed the ruler of the Madras standing near, saying, "Ascend the vehicle." Thereupon Shalya of mighty energy ascended that large, invincible, and foremost of cars, belonging to Karna like a lion ascending a mountain summit. Beholding Shalya stationed, Karna ascended his excellent car like the Sun riding on a mass of clouds charged with lightning. Mounted on the same car, those two heroes endued with the splendour or the Sun of fire looked resplendent like Surya and Agni sitting together on a cloud in the firmament. Eulogised then (by bards and panegyrists), those two heroes of great effulgence looked like Indra and Agni adored with hymns in a sacrifice by Ritwiks and Sadasyas. Karna stood on that car, the reins of whose steeds were held by Shalya, stretching his formidable bow, like the Sun himself within a halo of circular light. Stationed on that foremost of cars, that tiger among men, Karna, with his shafts constituting his rays, looked beautiful like the Sun on the Mandara mountains.