Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.52 — Solitude and meditation
विविक्तसेवी लघ्वाशी यतवाक्कायमानसः। ध्यानयोगपरो नित्यं वैराग्यं समुपाश्रितः ॥
viviktasevī laghvāśī yatavākkāyamānasaḥ | dhyānayogaparo nityaṃ vairāgyaṃ samupāśritaḥ ||
Meaning
living in solitude, eating lightly, restraining speech, body and mind, always absorbed in meditation, and holding firmly to detachment —