Chapter 17 · verse 14 · gita.yoga.org

Bhagavad Gita 17.14

देवद्विजगुरुप्राज्ञपूजनं शौचमार्जवम्।ब्रह्मचर्यमहिंसा च शारीरं तप उच्यते

Worship of the gods, the twice-born, the teachers, and the wise; purity, straightforwardness, celibacy, and non-injury are all called the austerities of the body.