Bhagavad Gita Chapter 17 Verse 19
भगवद् गीता अध्याय 17 श्लोक 19

मूढग्राहेणात्मनो यत्पीडया क्रियते तपः।
परस्योत्सादनार्थं वा तत्तामसमुदाहृतम्।।17.19।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 17.19)
।।17.19।।जो तप मूढ़तापूर्वक हठसे अपनेको पीड़ा देकर अथवा दूसरोंको कष्ट देनेके लिये किया जाता है? वह तप तामस कहा गया है।


Rudra Vaishnava Sampradaya - Commentary

Now Lord Krishna explains tapah or austerities that are indicative  of  tama
guna the  mode  of  ignorance.  The  austerities  that  consist  of  foolish
concoctions as well  as  diabolical  practices  due  to  an  acute  lack  of
discrimination, which is sadistic and masochistic, which causes  mental  and
physical anguish to oneself such as flagellation and causes acute  suffering
to others such  as  blood  rituals  and  human  and  animal  sacrifices  are
irrevocably situated completely in the darkness of tama guna.


Brahma Vaishnava Sampradaya - Commentary



Shri Vaishnava Sampradaya - Commentary

Now Lord Krishna explains the austerities that are of tama guna or  mode  of
ignorance. The word mudha means foolish. The word grahena  means  endeavour.
Those who foolishly endeavour are the ignorant. Those who torture  and  give
pain to themselves and diabolically cause injury  and  suffering  to  others
are depraved and their dark resolves  are  at  the  pinnacle  of  nescience.
Whatever activity they enact  by  such  convoluted  resolves  regardless  of
success or failure is in the darkness of tama guna.


Kumara Vaishnava Sampradaya - Commentary
Now Lord Krishna explains the austerities that are of tama guna or  mode  of
ignorance. The word mudha means foolish. The word grahena  means  endeavour.
Those who foolishly endeavour are the ignorant. Those who torture  and  give
pain to themselves and diabolically cause injury  and  suffering  to  others
are depraved and their dark resolves  are  at  the  pinnacle  of  nescience.
Whatever activity they enact  by  such  convoluted  resolves  regardless  of
success or failure is in the darkness of tama guna.