BG 17.5

अशास्त्रविहितं घोरं तप्यन्ते ये तपो जनाः । दम्भाहंकारसंयुक्ताः कामरागबलान्विताः ॥

aśāstra-vihitaṃ ghoraṃ tapyante ye tapo janāḥ | dambhāhaṃkāra-saṃyuktāḥ kāma-rāga-balānvitāḥ ||

"Those who practice ghora tapas without śāstric sanction, driven by dambha, ahaṃkāra, kāma and rāga — āsurī tapas."

All public-domain translations

4 translations · all pre-1928 or released to public domain · sources

Shankaracharya's commentary, trans. Alladi Mahadeva Sastry (1897)

[1]
Those men who practise terrific austerities not enjoined by the scripture, given to hypocrisy and egotism, endued with the strength of lust and passion;

Swami Swarupananda, Srimad Bhagavad Gita (1909)

[4]
Those men who practise terrific austerities not enjoined by the scriptures, given to hypocrisy and egoism, endued with the strength of lust and passion;

K.T. Telang, Sacred Books of the East Vol. 8 (1882)

[9]
Those men who practise terrific austerities not enjoined by scripture, given to hypocrisy and egoism, endued with strength of desire and passion;

K.M. Ganguli, The Mahabharata, Bhishma Parva (1883–96)

[13]
Those people who practice severe ascetic austerities not ordained by the scriptures, are given up to hypocrisy and pride, and endued with desire of attachment and violence.