Srimad Bhagavad Gita starts with Arjuna Vishada Yoga. On demand of Dhrutharashtra, Sanjay used to narrate the an overall brief of the battle field of both armies. Seeing his own relatives in the battlefield Arjuna got devastated inside-out. Leaving his weapon he broke down into tears. This particular referred as Vishada Yoga in Bhagavad Gita.