Mahabharata 5.47.58

5.47.58

yadā rathe gāṇḍivaṃ vāsudevaṃ divyaṃ śaṅkhaṃ pāñcajanyaṃ hayāṃśca |
tūṇāvakṣayyau devadattaṃ ca māṃ ca draṣṭā yuddhe dhārtarāṣṭraḥ sametān || 58 ||

When he will behold his own troops, covered with the dust raised by my car wander in all directions, torn to pieces by Gandiva and reft of senses, then will that wretch repent. When he will behold his whole army running away in fear in all directions, mangled in limbs, and bereft of senses; when he will behold his steeds, elephants, and foremost of heroes slain; when he will see his troops thirsty, struck with panic, wailing aloud, dead and dying, with their animals exhausted; and hair, bones and skulls lying in heaps around like half-wrought works of the Creator, then will that wretch repent. When he will behold on my car, Gandiva, Vasudeva, and the celestial conch Panchajanya, myself, my couple of inexhaustible quivers, and my conch called Devadatta as also my white steeds, then will the son of Dhritarashtra repent for this war. When I consume the Kauravas, like Agni consuming innumerable wicked souls assembled together at the time of ushering in another Yuga at the end of the last one, then Dhritarashtra with all his sons repent. When the wicked, hearted and the wrathful son of Dhritarashtra will be deprived of prosperity with brothers and army and followers, then, reft of pride and losing heart and trembling all over, will that fool repent. One morning when [paragraph continues] I had finished my water-rites and prayers, a Brahmana spoke unto me these pleasant words, 'O Partha, thou shalt have to execute a very difficult task.