Mbh 9.57.1b

Beholding his foe, the son of Pandu, thus whirling his mace endued with unrivalled impetuosity, Duryodhana became filled with amazement. Indeed, the heroic Vrikodara, O Bharata, as he careered in diverse courses, presented a highly beautiful spectacle. Both bent upon carefully protecting themselves, as they approached, they repeatedly mangled each other like two cats fighting for a piece of meat. Bhimasena performed diverse kinds of evolutions. He coursed in beautiful circles, advanced, and receded. He dealt blows and warded off those of his adversary, with wonderful activity. He took up various kinds of position (for attack and defence). He delivered attacks and avoided those of his antagonist. He ran at his foe, now turning to the right and now to the left. He advanced straight against the enemy. He made ruses for drawing his foe. 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.