Karma yoga is the path of action taught in the Bhagavad Gītā. Kṛṣṇa tells Arjuna that no one can refrain from acting, and that bondage comes not from action but from attachment to its results. Work done as an offering, with an even mind in success and failure, purifies the heart and prepares it for knowledge.
Karma Yoga
The yoga of action: doing one’s duty without attachment to its fruits, offered to God.
Also: Karma yoga, the yoga of action