One verse

Bhagavad Gita 18.9

18.9

कार्यमित्येव यत्कर्म नियतं क्रियतेऽर्जुन | सङ्गं त्यक्त्वा फलं चैव स त्यागः सात्त्विको मतः ||१८-९||

kāryamityeva yatkarma niyataṃ kriyate.arjuna . saṅgaṃ tyaktvā phalaṃ caiva sa tyāgaḥ sāttviko mataḥ ||18-9||

kāryam
it must be done
iti
thus
eva
indeed
yat
which
karma
work
niyatam
prescribed
kriyate
is performed
arjuna
O Arjuna
saṅgam
association
tyaktvā
giving up
phalam
the result
ca
also
eva
certainly
saḥ
that
tyāgaḥ
renunciation
sāttvikaḥ
in the mode of goodness
mataḥ
in My opinion

O Arjuna, when one performs his prescribed duty only because it ought to be done, and renounces all material association and all attachment to the fruit, his renunciation is said to be in the mode of goodness.