Mbh 6.77.3a

“Then when Bhimasena thus penetrated the Dhartarashtra host, Dhrishtadyumna the son of Prishata, forsaking Drona (with whom he had been engaged), quickly proceeded to the spot where Suvala’s son was stationed. That bull among men, battling countless warriors of thy army, came upon the empty car of Bhimasena in that battle. And beholding in that conflict Visoka, the charioteer of Bhimasena, Dhrishtadyumna, O king, became exceedingly cheerless and almost deprived of his senses. With voice choked in tears, and sighing as he spoke, he asked Visoka, in grief, saying, ‘Where is Bhima who is dear to me as my life itself?’ Visoka then, joining his hands, replied unto Dhrishtadyumna saying, ‘The mighty son of Pandu, endued with great strength, ordering me to wait for him here, hath alone penetrated into the Dhartarashtra host that resembleth the very ocean. That tiger among men very cheerfully said unto me these words--“Wait for me, O charioteer, restraining the steeds for a short space of time, that is, till I slay those that are bent upon my destruction.”--Beholding then the mighty Bhima rushing mace in hand, all our troops (that supported him) became filled with delight. Then in this fierce and terrible battle, O prince, thy friend, breaking the mighty array (of the foe), hath penetrated into it.’ Hearing these words of Visoka, Prishata’s son Dhrishtadyumna, endued with great strength, said unto the charioteer these words on the field of battle. ‘What need have I today of life itself, if forgetting my affection for the Pandavas, I forsake Bhima in battle? If I return today without Bhima, what will the Kshatriyas say of me? What will they say of me when they will learn that while I was on the field Bhima penetrated alone into the hostile array making a single opening in it? The gods with Indra at their head visit him with evil who, forsaking his comrades in battle, returneth home unhurt! The mighty Bhima again is my friend and kinsman.