He who performs his prescribed duty only because it ought to be done, and renounces all attachment to the fruit-his renunciation is of the nature of goodness, O Arjuna. BG 18.9 - 1972

Expressions researched:
"he who performs his prescribed duty only because it ought to be done, and renounces all attachment to the fruit-his renunciation is of the nature of goodness, O Arjuna"

Bhagavad-gita As it is

BG Chapters 13 - 18

But he who performs his prescribed duty only because it ought to be done, and renounces all attachment to the fruit-his renunciation is of the nature of goodness, O Arjuna.

BG 18.9 (1972), Translation and Purport

But he who performs his prescribed duty only because it ought to be done, and renounces all attachment to the fruit-his renunciation is of the nature of goodness, O Arjuna.

Prescribed duties must be performed with this mentality. One should act without attachment for the result; he should be disassociated from the modes of work. A man working in Kṛṣṇa consciousness in a factory does not associate himself with the work of the factory, nor with the workers of the factory. He simply works for Kṛṣṇa. And when he gives up the result for Kṛṣṇa, he is acting transcendentally.