BG 17.17
श्रद्धया परया तप्तं तपस्तत्ित्रविधं नरैः।अफलाकाङ्क्षिभिर्युक्तैः सात्त्विकं परिचक्षते
śhraddhayā parayā taptaṁ tapas tat tri-vidhaṁ naraiḥ aphalākāṅkṣhibhir yuktaiḥ sāttvikaṁ parichakṣhate
These threefold austerities, performed with faith and without thought of reward, can truly be considered pure.
Translated by Shri Purohit Swami
This threefold austerity, practiced by steadfast men, with the utmost faith, desiring no reward, is called Sattvic.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
śhraddhayā—with faith; parayā—transcendental; taptam—practiced; tapaḥ—austerity; tat—that; tri-vidham—three-fold; naraiḥ—by persons; aphala-ākāṅkṣhibhiḥ—without yearning for material rewards; yuktaiḥ—steadfast; sāttvikam—in the mode of goodness; parichakṣhate—are designated