अनुद्वेगकरं वाक्यं सत्यं प्रियहितं च यत्। स्वाध्यायाभ्यसनं चैव वाङ्मयं तप उच्यते॥
anudvegakaraṃ vākyaṃ satyaṃ priyahitaṃ ca yat svādhyāyābhyasanaṃ caiva vāṅmayaṃ tapa ucyate
Meaning
Speech that hurts no one, that is true, pleasant to listen to, and beneficial, and the constant study of the scriptures—this is austerity of speech.
English translation by Shri Purohit Swami (1935), public domain. Sanskrit text in the public domain. About Duvidha