Mbh 3.51.1a

Vaisampayana said, “That bull among men--Dhritarashtra--the son of Amvika, having heard of this wonderful way of life--so above that of men--of the sons of Pandu, was filled with anxiety and grief. And overwhelmed with melancholy and sighing heavily and hot, that monarch, addressing his charioteer Sanjaya, said, ‘O charioteer, a moment’s peace I have not, either during the day or the night, thinking of the terrible misbehaviour of my sons arising out of their past gambling, and thinking also of the heroism, the patience, the high intelligence, the unbearable prowess, and the extraordinary love unto one another of the sons of Pandu. Amongst the Pandavas, the illustrious Nakula and Sahadeva, of celestial origin and equal unto the chief himself of the celestials in splendour, are invincible in battle. They are firm in the wielding of weapons, capable of shooting at a long distance, resolute in battle, of remarkable lightness of hand, of wrath that is not easily quelled, possessed of great steadiness, and endued with activity. Possessed of the prowess of lions and unbearable as the Aswins themselves, when they will come to the field of battle with Bhima and Arjuna in front, I see, O Sanjaya, that my soldiers will all be slain without a remnant. Those mighty warriors of celestial origin, unrivalled in battle by anybody, filled with rage at the remembrance of that insult to Draupadi, will show no forgiveness. The mighty warriors of the Vrishnis also, and the Panchalas of great energy, and the sons of Pritha themselves, led by Vasudeva of unbaffled prowess, will blast my legions. O charioteer, all the warriors on my side assembled together, are not competent to bear the impetus of the Vrishnis alone when commanded by Rama and Krishna. And amongst them will move that great warrior Bhima of terrible prowess, armed with his iron mace held on high and capable of slaying every hero. And high above the din will be heard the twang of the Gandiva loud as the thunder of heaven.