Chapter 17 · verse 18 · gita.yoga.org

Bhagavad Gita 17.18

सत्कारमानपूजार्थं तपो दम्भेन चैव यत्।क्रियते तदिह प्रोक्तं राजसं चलमध्रुवम्

The austerity that is practiced with the aim of gaining good reception, honor, and worship, and with hypocrisy, is said to be Rajasic, unstable, and transient.