O Arjuna! See there, the Pandava warriors have loosened the steps of the huge army of enemies. This This Karna is preventing the Kauravas' warriors departing away from the battle-field.
निवृत्तैश्च पुनः पार्थेर्भग्नं शत्रुबलं महत्। कौरवान् द्रवतो ह्येष कर्णो रोधयतेऽर्जुन॥