Bhagavad-gītā 17.17
BG 17.17
Open the full passageश्रद्धया परया तप्तं तपस्तत्त्रिविधं नरैः । अफलाकाङ्क्षिभिर्युक्तैः सात्त्विकं परिचक्षते ॥१७॥
Sanskrit
śraddhayā parayā taptaṁ tapas tat tri-vidhaṁ naraiḥ aphalākāṅkṣibhir yuktaiḥ sāttvikaṁ paricakṣate
Translation
This threefold austerity, performed with transcendental faith by men not expecting material benefits but engaged only for the sake of the Supreme, is called austerity in goodness.