Chapter 17 · The Three Kinds of Faith · Krishna said
Bhagavad Gita 17.18 — Rajasic austerity
सत्कारमानपूजार्थं तपो दम्भेन चैव यत्। क्रियते तदिह प्रोक्तं राजसं चलमध्रुवम् ॥
satkāramānapūjārthaṃ tapo dambhena caiva yat | kriyate tadiha proktaṃ rājasaṃ calamadhruvam ||
Meaning
Austerity done to gain respect, honour and worship, and with show, is rajasic; it is unsteady and short-lived.