Sanjaya said The five Pandavas brothers, all of fierce deeds in battle and all incapable of being overcome by fatigue as is apparent from their achievements, when aided by Krishna, could not be vanquished even by the celestials.
संजय उवाच समरेऽत्युग्रकर्माणः कर्मभिर्व्यञ्जितश्रमाः। सकृष्णाः पाण्डवाः पञ्च देवैरपि दुरासदाः॥