అదయి ౧౭   శ్లోక  ౧౯

Chapter – 17 – Shloka – 19

When self-control is incorrectly performed by a dull person and results simply in self-torture for the person who is trying to restrain himself, or when it is performed for the sake of causing injury to another person, then this self-control leads to nowhere but into sheer darkness and further along the path of the Tamas Guna.

जो तप मूढ़ता पूर्वक हठ से, मन, वाणी और शरीर की पीड़ा के सहित अथवा दूसरे के अनिष्ट करने के लिये किया जाता है —- वह तप तामस कहा गया है ।। १९ ।।

The Gita in Sanskrit, Hindi, Gujarati, Marathi, Nepali and English – The Gita.net