Bhagwad Gita
Chapter 18, Verse 52
विविक्तसेवी लघ्वाशी यतवाक्कायमानसः।ध्यानयोगपरो नित्यं वैराग्यं समुपाश्रितः।।18.52।।
Dwelling in solitude, eating sparingly, with speech, body, and mind subdued, always engaged in meditation and concentration, and resorting to dispassion.