Bhagavad Gita 17.28

अश्रद्धया हुतं दत्तं तपस्तप्तं कृतं च यत्।असदित्युच्यते पार्थ न च तत्प्रेत्य नो इह ॥१७.२८॥

aśraddhayā hutaṃ dattaṃ tapastaptaṃ kṛtaṃ ca yatasadityucyate pārtha na ca tatpretya no iha

Whatever is sacrificed, given, or performed, and whatever austerity is practiced without faith, it is called 'Asat', O Arjuna; it is of no value here or hereafter (after death).

गीता