One verse

Bhagavad Gita 18.6

18.6

एतान्यपि तु कर्माणि सङ्गं त्यक्त्वा फलानि च | कर्तव्यानीति मे पार्थ निश्चितं मतमुत्तमम् ||१८-६||

etānyapi tu karmāṇi saṅgaṃ tyaktvā phalāni ca . kartavyānīti me pārtha niścitaṃ matamuttamam ||18-6||

etāni
all these
api
certainly
tu
but
karmāṇi
activities
saṅgam
association
tyaktvā
renouncing
phalāni
results
ca
also
kartavyāni
should be done as duty
iti
thus
me
My
pārtha
O son of Pṛthā
niścitam
definite
matam
opinion
uttamam
the best

All these activities should be performed without attachment or any expectation of result. They should be performed as a matter of duty, O son of Pṛthā. That is My final opinion.