Acting without claiming the fruit
Bhagavad Gītā · 2.47
The most quoted half-verse in the Gītā, your business is the action, never its result.
karmaṇy-evādhikāras te mā phaleṣu kadācana | mā karma-phala-hetur bhūr mā te saṅgo 'stv akarmaṇi ||
Your right is to the action alone, never to its fruits. Let not the fruits of action be your motive; neither let there be attachment to inaction.
Everyone knows the first line; the second is where the teaching bites. Kṛṣṇa does not say “abandon results”, results arrive whether wanted or not. He names the psychological error instead: letting the imagined harvest write this morning’s work. The cook cooking for applause is already a worse cook.
Note also what the verse forbids second: attachment to inaction. Nishkāma karma (desireless action) is not withdrawal; it is work done whole, offered rather than traded. Gandhi ran an ashram, a newspaper and a freedom movement on this half-verse, which is fair evidence that it does not mean quietism.