Bhagavad Gita 18.34

यया तु धर्मकामार्थान् धृत्या धारयतेऽर्जुन।प्रसङ्गेन फलाकाङ्क्षी धृतिः सा पार्थ राजसी॥

yayā tu dharmakāmārthān dhṛtyā dhārayate'rjuna |prasaṅgena phalākāṅkṣī dhṛtiḥ sā pārtha rājasī ||

But that, O Arjuna, by which one holds fast to Dharma (duty), enjoyment of pleasures, and earning of wealth, on account of attachment and desire for reward—that firmness, O Arjuna, is Rajasic (passionate).

The conviction that always holds fast to rituals, self-interest, and wealth for the sake of what they may bring forth comes from passion.

Our plain-language meaning of this verse is waiting for scholar review.