अशास्त्रविहितं घोरं तप्यन्ते ये तपो जनाः।
17.5 Those persons who, given to ostentation and pride, and possessed of passion, attachment and strength, undertake severe austerities not sanctioned in the scriptures;
17.5 Those men who practise terrific austerities not enjoined by the scriptures, given to hypocrisy and egoism, impelled by the force of lust and attachment.
17.5. Those men, who practise terrible austerities, not as enjoined in the scriptures; who are bound to hypocricy and conceit, and are endowed with (i.e. impelled by) the force of passion for the desired objects;
Ashaastravihitam ghoram tapyante ye tapo janaah; Dambhaahamkaarasamyuktaah kaamaraagabalaanvitaah.
aśhāstra-vihitam—not enjoined by the scriptures; ghoram—stern; tapyante—perform; ye—who; tapaḥ—austerities; janāḥ—people; dambha—hypocrisy; ahankāra—egotism; sanyuktāḥ—possessed of; kāma—desire; rāga—attachment; bala—force; anvitāḥ—impelled by; karṣhayantaḥ—torment; śharīra-stham—within the body; bhūta-grāmam—elements of the body; achetasaḥ—senseless; mām—me; cha—and; eva—even; antaḥ—within; śharīra-stham—dwelling in the body; tān—them; viddhi—know; āsura-niśhchayān—of demoniacal resolves