Mbh 9.57.1a

"Sanjaya said, 'Duryodhana, with heart undepressed, beholding Bhimasena in that state, rushed furiously against him, uttering a loud roar. They encountered each other like two bulls encountering each other with their horns. The strokes of their maces produced loud sounds like those of thunderbolts. Each longing for victory, the battle that took place between them was terrible, making the very hair stand on end, like that between Indra and Prahlada. All their limbs bathed in blood, the two high-souled warriors of great energy, both armed with maces, looked like two Kinsukas decked with flowers. During the progress of that great and awful encounter, the welkin looked beautiful as if it swarmed with fire-flies. After that fierce and terrible battle had lasted for some time, both those chastisers of foes became fatigued. Having rested for a little while, those two scorchers of foes, taking up their handsome maces, once again began to ward off each others' attacks. Indeed, when those two warriors of great energy, those two foremost of men, both possessed of great might, encountered each other after having taken a little rest, they looked like two elephants infuriated with passion and attacking each other for obtaining the companionship of a cow elephant in season. Beholding those two heroes, both armed with maces and each equal to the other in energy, the gods and Gandharvas and men became filled with wonder. Beholding Duryodhana and Vrikodara both armed with maces, all creatures became doubtful as to who amongst them would be victorious. Those two cousins, those two foremost of mighty men, once again rushing at each other and desiring to take advantage of each other's lapses, waited each watching the other. The spectators, O king, beheld each armed with his uplifted mace, that was heavy, fierce, and murderous, and that resembled the bludgeon of Yama or the thunder-bolt of Indra. While Bhimasena whirled his weapon, loud and awful was the sound that it produced.