Mahabharata 9.56.22

9.56.22

dakṣiṇaṃ maṇḍalaṃ rājandhārtarāṣṭro'bhyavartata |
savyaṃ tu maṇḍalaṃ tatra bhīmaseno'bhyavartata || 22 ||

He stood immovable, prepared for attacking his foe as soon as the latter would expose himself to attack. He circumambulated his foe, and prevented his foe from circumambulating him. He avoided the blows of his foe by moving away in bent postures or jumping aloft. He struck, coming up to his foe face to face, or dealt back-thrusts while moving away from him. Both accomplished in encounters with the mace, Bhima and Duryodhana thus careered and fought, and struck each other. Those two foremost ones of Kuru's race careered thus, each avoiding the other's blows. Indeed, those two mighty warriors thus coursed in circles and seemed to sport with each other. Displaying in that encounter their skill in battle, those two chastisers of foes sometimes suddenly attacked each other with their weapons, like two elephants approaching and attacking each other with their tusks. Covered with blood, they looked very beautiful, O monarch, on the field. Even thus occurred that battle, awfully and before the gaze of a large multitude, towards the close of the day, like the battle between Vritra and Vasava. Armed with maces, both began to career in circles. Duryodhana, O monarch, adopted the right mandala, while Bhimasena adopted the left mandala. While Bhima was thus careering in circles on the field of battle, Duryodhana, O monarch, suddenly struck him a fierce blow on one of his flanks. Struck by thy son, O sire, Bhima began to whirl his heavy mace for returning that blow.