text: The Kalpa Sūtra () is a Jain text containing the biographies of the Jain Tirthankaras, notably Parshvanatha and Mahavira. Traditionally ascribed to Bhadrabahu, which would place it in the 4th century BCE, it was probably put in writing 980 or 993 years after the Nirvana (Moksha) of Mahavira.