Bhagavad Gita 17.12

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

abhisaṃdhāya tu phalaṃ dambhārthamapi caiva yatijyate bharataśreṣṭha taṃ yajñaṃ viddhi rājasam

The sacrifice that is offered, O Arjuna, seeking a reward and for show, know that to be a Rajasic Yajna.

गीता