BG 17.15
अनुद्वेगकरं वाक्यं सत्यं प्रियहितं च यत् ।
स्वाध्यायाभ्यसनं चैव वाङ्मयं तप उच्यते ॥
स्वाध्यायाभ्यसनं चैव वाङ्मयं तप उच्यते ॥
anudvega-karaṁ vākyaṁ
satyaṁ priya-hitaṁ ca yat
svādhyāyābhyasanaṁ caiva
vāṅ-mayaṁ tapa ucyate
satyaṁ priya-hitaṁ ca yat
svādhyāyābhyasanaṁ caiva
vāṅ-mayaṁ tapa ucyate
Word-for-word meanings
vākyam — speech; yat — which [is]; anudvega-karam — not annoying to others; satyam — truthful; priya — pleasing; ca — and; hitam — beneficial; ca eva — and indeed; abhyasanam — regular practice; svādhyāya — [of] the study and recitation of the Vedas; ucyate — is said to be; tapaḥ — austerity; vāk-mayam — related to speech.
Translation
Speech that is not annoying to others, that is truthful, pleasing, and beneficial, as well as the regular study and recitation of the Vedas, is said to be the austerity of speech.