Bhagavad Gita 14.16

कर्मणः सुकृतस्याहुः सात्त्विकं निर्मलं फलम्।रजसस्तु फलं दुःखमज्ञानं तमसः फलम् ॥१४.१६॥

karmaṇaḥ sukṛtasyāhuḥ sāttvikaṃ nirmalaṃ phalamrajasastu phalaṃ duḥkhamajñānaṃ tamasaḥ phalam

They say that the fruit of good action is Sattvic and pure; indeed, the fruit of Rajas is pain, and the fruit of Tamas is ignorance.

गीता