Chapter 6 · verse 10 · gita.yoga.org

Bhagavad Gita 6.10

योगी युञ्जीत सततमात्मानं रहसि स्थितः। एकाकी यतचित्तात्मा निराशीरपरिग्रहः

Let the yogi constantly strive to keep the mind steady, remaining in solitude, alone, with the body and mind controlled, and free from hope and greed.