Bhagavad Gita 17.14

देवद्विजगुरुप्राज्ञपूजनं शौचमार्जवम्।ब्रह्मचर्यमहिंसा च शारीरं तप उच्यते॥

devadvijaguruprājñapūjanaṃ śaucamārjavam |brahmacaryamahiṃsā ca śārīraṃ tapa ucyate ||

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.

Worship of God and the Master; respect for the preacher and the philosopher; purity, rectitude, continence, and harmlessness—all of these constitute physical austerity.

Our plain-language meaning of this verse is waiting for scholar review.