In Jainism, Acharya Shantisagar Ji Maharaj is renowned for having performed the rigorous austerity called Athan Tap (fasting for eight consecutive days without food) at the age of 90. Acharya Shantisagar Ji was a highly revered Digambara Jain monk who revived the tradition of full renunciation and inspired many with his deep penance and spiritual discipline. His life exemplifies the Jain ideals of tapasya (austerity), non-attachment, and self-control.