अश्रद्धया हुतं दत्तं तपस्तप्तं कृतं च यत् ।असदित्युच्यते पार्थ न च तत्प्रेत्य नो इह ॥
aśraddhayā hutaṃ dattaṃ tapastaptaṃ kṛtaṃ ca yat |asadityucyate pārtha na ca tatpretya no iha ||
Whatever is offered in sacrifice, given in charity, or practiced as austerity without faith, or any other act done that way, is called "asat," O Partha. It counts for nothing, neither after death nor here in this life.
Explanation
Krishna closes chapter 17, which sorts religious practice by the three qualities (guṇas). Having explained that "sat" marks what is good and true, he now names its opposite, "asat" (unreal or worthless). Rites, giving and austerity (tapas) done without faith (śraddhā) bear no real fruit, either in this world or beyond.