aphalākāṅkṣhibhir yajño vidhi-driṣhṭo ya ijyate
yaṣhṭavyam eveti manaḥ samādhāya sa sāttvikaḥ||11||

Meaning : Sacrifice performed without desire for personal gain, done according to the rules, and with a steady mind focused on what should be done — that kind of sacrifice is considered sattvic (pure).