Bhagavad Gita 14.16

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

karmaṇaḥ sukṛtasyāhuḥ sāttvikaṃ nirmalaṃ phalam |rajasastu 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.

They say the fruit of a meritorious action is spotless and pure; the outcome of passion is misery, and of ignorance, darkness.

Our plain-language meaning of this verse is waiting for scholar review.