Bhagavad Gita 18.18 Chapter 18, Verse 18

ज्ञानं ज्ञेयं परिज्ञाता त्रिविधा कर्मचोदना ।
करणं कर्म कर्तेति त्रिविधः कर्मसंग्रहः ॥१८.१८॥

jñānaṃ jñeyaṃ parijñātā trividhā karmacodanā
karaṇaṃ karma karteti trividhaḥ karmasaṃgrahaḥ

Meaning

Knowledge, the known and the knower are the three impulses to action; the instrument, the action and the doer are the three components of action.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 18.18 (Chapter 18, Liberation through Renunciation (Moksha Sannyasa Yoga), Verse 18)