The Sauptika Parva (Sanskrit: सौप्तिक पर्व), or the "Book of the Sleepers," is the tenth of eighteen books of the Indian Epic Mahabharata. Sauptika Parva traditionally has 2 parts and 18 chapters, as does the critical edition.[1][2][3][4]
Sauptika Parva is mainly the story of the revenge of the 3 survivors of the Kaurava army - Ashwatthama, Kritavarma and Kripacharya. These 3 attacked the Pandava camp at night, when everyone was sleeping, or inactive. Ashwatthama killed several warriors of the Pandava camp, such as the commander Dhrishtadyumna, the Upapandavas, Shikhandini, Uttamaujas, Yudhamanyu and several others. Eventually, only 8 participants of the war from the Pandava camp - the Pandavas, Krishna, Satyaki and Yuyutsu - survive.