Mahabharata 7.1.37

7.1.37

tvayā tu pāṇḍaveyeṣu nihateṣu mahāmṛdhe |
duryodhanamanujñāpya vanaṃ yāsyāmi kaurava || 37 ||

All hearts turned to that foremost of all wielders of arms, that one resembling a guest resplendent (with learning and ascetic austerities). And all hearts turned to him, as the heart of a man in distress turneth to a friend capable of relieving that distress. And, O Bharata, the kings then cried out saying, Karna! Karna! The son of Radha, our friend, the son of a Suta, that one who is ever prepared to lay down his life in battle! Endued with great fame, Karna, with his followers and friends, did not fight for these ten days. O, summon him soon!' The mighty-armed hero, in the presence of all the Kshatriyas, during the mention of valiant and mighty car-warriors, was by Bhishma classed as an Ardha-ratha, although that bull among men is equal to two Maharathas! Even thus was he classed during the counting of Rathas and Atirathas, he that is the foremost (of all Rathas and Atirathas), he that is respected by all heroes, he that would venture to fight even with Yama, Kuvera, Varuna, and Indra. Through anger caused by this, O king, he had said unto Ganga's son these words: 'As long as thou livest, O thou of Kuru's race, I will never fight! if thou, however, succeedest in slaying the sons of Pandu in great battle, I shall, O Kaurava, with Duryodhana's permission, retire into the woods.