Mahabharata 1.128.2

1.128.2

pāñcālarājaṃ drupadaṃ gṛhītvā raṇamūrdhani |
paryānayata bhadraṃ vaḥ sā syātparamadakṣiṇā || 2 ||

"Vaisampayana continued, 'Beholding the Pandavas and the son of Dhritarashtra accomplished in arms, Drona thought the time had come when he could demand the preceptorial fee. And, O king, assembling his pupils one day together, the preceptor Drona asked of them the fee, saying, 'Seize Drupada, the king of Panchala in battle and bring him unto me. That shall be the most acceptable fee.' Those warriors then answering, 'So be it', speedily mounted up on their chariots, and for bestowing upon their preceptor the fee he had demanded, marched out, accompanied by him. Those bulls among men, smiting the Panchalas on their way, laid siege to the capital of the great Drupada. And Duryodhana and Karna and the mighty Yuyutsu, and Duhsasana and Vikarna and Jalasandha and Sulochana,--these and many other foremost of Kshatriya princes of great prowess, vied with one another in becoming the foremost in the attack. And the princes, riding in first class chariots and following the cavalry, entered the hostile capital, and proceeded along the streets.