Chapter 5 · The Yoga of Renunciation · Krishna said
Bhagavad Gita 5.13 — The city of nine gates
सर्वकर्माणि मनसा संन्यस्यास्ते सुखं वशी। नवद्वारे पुरे देही नैव कुर्वन्न कारयन् ॥
sarvakarmāṇi manasā saṃnyasyāste sukhaṃ vaśī | navadvāre pure dehī naiva kurvanna kārayan ||
Meaning
The self-controlled person, mentally giving up all actions, lives happily in the city of nine gates — the body — neither acting nor causing action.