One verse

Bhagavad Gita 14.16

14.16

कर्मणः सुकृतस्याहुः सात्त्विकं निर्मलं फलम् | रजसस्तु फलं दुःखमज्ञानं तमसः फलम् ||१४-१६||

karmaṇaḥ sukṛtasyāhuḥ sāttvikaṃ nirmalaṃ phalam . rajasastu phalaṃ duḥkhamajñānaṃ tamasaḥ phalam ||14-16||

karmaṇaḥ
of work
su-kṛtasya
pious
āhuḥ
is said
sāttvikam
in the mode of goodness
nirmalam
purified
phalam
the result
rajasaḥ
of the mode of passion
tu
but
phalam
the result
duḥkham
misery
ajñānam
nonsense
tamasaḥ
of the mode of ignorance
phalam
the result

The result of pious action is pure and is said to be in the mode of goodness. But action done in the mode of passion results in misery, and action performed in the mode of ignorance results in foolishness.