Bhagavad Gita Chapter 5.12
yuktaḥ karma-phalaḿ tyaktvā
śāntim āpnoti naiṣṭhikīm
ayuktaḥ kāma-kāreṇa
phale sakto nibadhyate
Translation
The steadily devoted soul attains unadulterated peace because he offers the result of all activities to Me; whereas a person who is not in union with the Divine, who is greedy for the fruits of his labor, becomes entangled.