मूढग्राहेणात्मनो यत्पीडया क्रियते तपः।परस्योत्सादनार्थं वा तत्तामसमुदाहृतम्
mūḍha-grāheṇātmano yat pīḍayā kriyate tapaḥ parasyotsādanārthaṁ vā tat tāmasam udāhṛitam
Austerity done under delusion, and accompanied with sorcery or the infliction of pain upon oneself or another, may be assumed to spring from ignorance.
Translated by Shri Purohit Swami
That austerity which is practised out of a foolish notion, with self-torture, or for the purpose of destroying another, is declared to be of the Tamasic nature.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
mūḍha—those with confused notions; grāheṇa—with endeavor; ātmanaḥ—one’s own self; yat—which; pīḍayā—torturing; kriyate—is performed; tapaḥ—austerity; parasya—of others; utsādana-artham—for harming; vā—or; tat—that; tāmasam—in the mode of ignorance; udāhṛitam—is described to be