Bhagavad-gītā 18.6
BG 18.6
Open the full passageएतान्यपि तु कर्माणि सङ्गं त्यक्त्वा फलानि च । कर्तव्यानीति मे पार्थ निश्चितं मतमुत्तमम् ॥६॥
Sanskrit
etāny api tu karmāṇi saṅgaṁ tyaktvā phalāni ca kartavyānīti me pārtha niścitaṁ matam uttamam
Translation
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.