अफलाकाङ्क्षिभिर्यज्ञो विधिदृष्टो य इज्यते |
यष्टव्यमेवेति मन: समाधाय स सात्त्विक: || 11||
aphalākāṅkṣhibhir yajño vidhi-driṣhṭo ya ijyate
yaṣhṭavyam eveti manaḥ samādhāya sa sāttvikaḥ
BG 17.11: Sacrifice that is performed according to the scriptural injunctions without expectation of rewards, with the firm conviction of the mind that it is a matter of duty is of the nature of goodness.