aśhraddhayā hutaṁ dattaṁ tapas taptaṁ kṛitaṁ cha yat
asad ity uchyate pārtha na cha tat pretya no iha||28||

Meaning : O Arjuna, whatever sacrifice is performed, or charity given, or austerity practiced without faith, without devotion, or done carelessly — that is called asad (false or fruitless). It does not bring benefit here or after death.