Mbh 9.18.1a

"Sanjaya said, 'After the slaughter of Shalya, O king, the followers of the Madra king, numbering seventeen hundred heroic car-warriors, proceeded for battle with great energy. Duryodhana riding upon an elephant gigantic as a hill, with an umbrella held over his head, and fanned the while with yak-tails, forbade the Madraka warriors, saying, "Do not proceed, Do not proceed!" Though repeatedly forbidden by Duryodhana, those heroes, desirous of slaying Yudhishthira, penetrated into the Pandava host. Those brave combatants, O monarch, loyal to Duryodhana, twanging their bows loudly, fought with the Pandavas. Meanwhile, hearing that Shalya had been slain and that Yudhishthira was afflicted by the mighty car-warriors of the Madrakas devoted to the welfare of the Madraka king, the great car-warrior Partha came there, stretching his bow Gandiva, and filling the Earth with the rattle of his car. Then Arjuna, and Bhima, and the two sons of Madri by Pandu, and that tiger among men, Satyaki, and the (five) sons of Draupadi, and Dhrishtadyumna, and Shikhandi, and the Pancalas and the Somakas, desirous of rescuing Yudhishthira, surrounded him on all sides. Having taken their places around the king, the Pandavas, those bulls among men, began to agitate the hostile force like Makaras agitating the ocean. Indeed, they caused thy army to tremble like a mighty tempest shaking the trees. Like the great river Ganges agitated by a hostile wind, the Pandava host, O king, once more became exceedingly agitated. Causing that mighty host to tremble, the illustrious and mighty car-warriors (the Madrakas), all shouted loudly, saying, "Where is that king Yudhishthira? Why are not his brave brothers, the Pandavas, to be seen here? What has become of the Pancalas of great energy as also of the mighty car-warrior Shikhandi? Where are Dhrishtadyumna and the grandson of Sini and those great car-warriors, the (five) sons of Draupadi?"