One verse

Bhagavad Gita 2.47

2.47

कर्मण्येवाधिकारस्ते मा फलेषु कदाचन | मा कर्मफलहेतुर्भूर्मा ते सङ्गोऽस्त्वकर्मणि ||२-४७||

karmaṇyevādhikāraste mā phaleṣu kadācana . mā karmaphalaheturbhūrmā te saṅgo.astvakarmaṇi ||2-47||

karmaṇi
in prescribed duties
eva
certainly
adhikāraḥ
right
te
of you
mā
never
phaleṣu
in the fruits
kadācana
at any time
mā
never
karma-phala
in the result of the work
hetuḥ
cause
bhūḥ
become
mā
never
te
of you
saṅgaḥ
attachment
astu
there should be
akarmaṇi
in not doing prescribed duties

You have a right to perform your prescribed duty, but you are not entitled to the fruits of action. Never consider yourself the cause of the results of your activities, and never be attached to not doing your duty.