Mbh 6.54.2a

Sanjaya said, “Thus urged by thy son, O great king, the mighty king of the Kalingas, accompanied by a large army advanced towards Bhima’s car. And Bhimasena, then, O Bharata, supported by the Chedis, rushed towards that large and mighty army of the Kalingas, abounding with cars, steeds, and elephants, and armed with mighty weapons, and advancing towards him with Ketumat, the son of the king of the Nishadas. And Srutayus also, excited with wrath, accoutred in mail, followed by his troops in battle-array, and, accompanied by king Ketumat, came before Bhima in battle. And the ruler of the Kalingas with many thousands of cars, and Ketumat with ten thousand elephants and the Nishadas, surrounded Bhimasena, O king, on all sides. Then the Chedis, the Matsyas, and Karushas, with Bhimasena at their head, with many kings impetuously rushed against the Nishadas. And then commenced the battle, fierce and terrible, between the warriors rushing at one another from desire of slaughter. And terrific was the battle that suddenly took place between Bhima and his foes, resembling the battle, O great king, between Indra and the mighty host of Diti’s sons. And loud became the uproar, O Bharata, of that mighty army struggling in battle, that resembled the sound of the roaring ocean. And the combatants, O king, cutting one another, made the whole field resemble a crematorium strewn with flesh and blood. And combatants, impelled by the desire of slaughter could not distinguish friend from foe. And those brave warriors, incapable of being easily defeated in battle, even began to strike down their own friend. And terrific was the collision that took place between the few and many, between the Chedis (on the one side) and the Kalingas and the Nishadas, O king, (on the other).