Mahabharath Chapter 22
Duryodhana humiliates Dronacharya for leaving the battlefield. Shakuni tricks Dronacharya and persuades him to stay. Later, Krishna tells the Pandavas to kill Ashwatthama, to make Dronacharya surrender. As Karna challenges Nakul and Sahadev, Arjuna challenges Dronacharya to a fight.