Bhagavad Gita · Karma YogaChapter 3, Shloka 19 (3.19)

"Asaktaḥ" twice. The verse says it twice — asaktaḥ. The emphasis is not on action but on action free from attachment.

"Kāryam karma". That which ought to be done — the duty of one's role; not action done at whim.

"Param" — what is it?

• Shankaracharya: paraṃ mokṣam … sattva-śuddhi-dvāreṇa — liberation, by way of purification of the inner being (that is, action → purification → knowledge → liberation). And the action is īśvarārtham — for Ishvara.
• Acharya Ramanuja: karma-yogena eva paraṃ āpnoti ātmānaṃ prāpnoti — through karma-yoga itself one attains the supreme, that is, the self. Together with vakṣyamāṇa-akartṛtvānusandhāna — the contemplation, to be explained later, that "I am not the (real) doer" (3.27–3.30). And yāvad-ātma-prāpti — until the self is attained.