मूढग्राहेणात्मनो यत्पीडया क्रियते तपः। परस्योत्सादनार्थं वा तत्तामसमुदाहृतम्॥
mūḍhagrāheṇātmano yatpīḍayā kriyate tapaḥ parasyotsādanārthaṃ vā tattāmasamudāhṛtam
Meaning
Austerity done under delusion, and accompanied with sorcery or the infliction of pain upon oneself or another, may be assumed to spring from ignorance.
English translation by Shri Purohit Swami (1935), public domain. Sanskrit text in the public domain. About Duvidha