The Kalpa Sūtra (Sanskrit: कल्पसूत्र) is a Jain text containing the biographies of the Jain Tirthankaras, notably Parshvanatha and Mahavira. Though traditionally ascribed to Bhadrabahu, it is a 7th century CE text, as it was believed to be only orally transmitted., it was probably put to writing only after 980 or 993 years after the Nirvana(Moksha) of Mahavira.