vidhi-diṣṭo ya ijyate
yaṣṭavyam eveti manaḥ
samādhāya sa sāttvikaḥ
aphala-ākāṅkṣibhiḥ — by those devoid of desire for result; yajñaḥ — sacrifice; vidhi-diṣṭaḥ — according to the direction of scripture; yaḥ — which; ijyate — is performed; yaṣṭavyam — must be performed; eva — certainly; iti — thus; manaḥ — mind; samādhāya — fixing; saḥ — it; sāttvikaḥ — in the mode of goodness.
Of sacrifices, the sacrifice performed according to the directions of scripture, as a matter of duty, by those who desire no reward, is of the nature of goodness.
. . .
अफलाकाङ्क्षिभिर्यज्ञो विधिदिष्टो य इज्यते ।
यष्टव्यमेवेति मन: समाधाय स सात्त्विक: ॥ ११ ॥