The Great Epic of the Bhārata dynasty 5.18.21-23

5.18.21

vaiśaṃpāyana uvāca |
evamāśvāsito rājā śalyena bharatarṣabha |
pūjayāmāsa vidhivacchalyaṃ dharmabhṛtāṃ varaḥ || 21 ||

"Vaisampayana continued, 'O best of Bharata's race, the king, that best of righteous men, thus encouraged by Salya, honoured him in proper form. And Yudhishthira, the son of Kunti, of powerful arms, having beard the words of Salya, spoke to the king of the Madras the following words, 'There is no doubt that thou wilt act as the charioteer of Karna. Thou must damp the spirits of Karna then by recounting the praises of Arjuna.'

5.18.22

śrutvā śalyasya vacanaṃ kuntīputro yudhiṣṭhiraḥ |
pratyuvāca mahābāhurmadrarājamidaṃ vacaḥ || 22 ||

5.18.23

bhavānkarṇasya sārathyaṃ kariṣyati na saṃśayaḥ |
tatra tejovadhaḥ kāryaḥ karṇasya mama saṃstavaiḥ || 23 ||