Mbh 7.190.2c

When the engagement became general and confused, (Yudhishthira) the son of Dharma, addressing all the foremost of warriors among the Panchalas and the Matsyas, said, “They that are our life, they that are our heads, they amongst us that are endued with great strength, those bulls among men are all engaged with the Dhartarashtras. Why do ye then stand thus, as if stupefied and deprived of your senses? Proceed thither where those car-warriors of my army are fighting. Driving away your fears and keeping in view the duties of Kshatriyas (engage in fight), for then conquering or slain ye will gain desirable goals. If you prove victors, you may perform diverse sacrifices with profuse gifts to Brahmanas. If, on the other hand, you are slain, becoming then equals of the celestials, you will win many regions of blessedness.” Thus urged by the king, those heroic and mighty car-warriors engaged in battle, observant of Kshatriya duties, quickly proceeded against Drona. The Panchalas then, from one side, assailed Drona with innumerable arrows, while others headed by Bhimasena began to resist him from another side. The Pandavas had three crooked-minded mighty car-warriors amongst them. They were Bhimasena and the twins (Nakula and Sahadeva). These addressed Dhananjaya loudly and said, “Rush, O Arjuna, with speed and drive away the Kurus from Drona’s vicinity. If the preceptor can be deprived of his protectors, the Panchalas may then slay him easily.” Thus addressed, Partha suddenly rushed against the Kauravas, while Drona rushed against the Panchalas headed by Dhrishtadyumna. Indeed, on that the fifth day (of Drona’s command) those heroic combatants, O Bharata, were grounded and crushed with great celerity (by Bharadwaja’s son.)’”