देवद्विजगुरुप्राज्ञपूजनं शौचमार्जवम्। ब्रह्मचर्यमहिंसा च शारीरं तप उच्यते॥
devadvijaguruprājñapūjanaṃ śaucamārjavam brahmacaryamahiṃsā ca śārīraṃ tapa ucyate
Meaning
Worship of God and the Master; respect for the preacher and the philosopher; purity, rectitude, continence, and harmlessness—all of these constitute physical austerity.
English translation by Shri Purohit Swami (1935), public domain. Sanskrit text in the public domain. About Duvidha