अभिसन्धाय तु फलं दम्भार्थमपि चैव यत् ।
इज्यते भरतश्रेष्ठ तं यज्ञं विद्धि राजसम् ॥ १७.१२ ॥

abhisandhāya tu phalaṁ dambhārtham-api caiva yat |
ijyate bharata-śreṣṭha taṁ yajñaṁ viddhi rājasam || 17.12 ||

Whenever the mind of the performer is linked to the result of any yajña, it becomes rājasika. Also, ostentation while performing any rituals makes the whole performance rājasika and inferior (17.12).