Bhagavad-gītā 17.15
BG 17.15
Open the full passageअनुद्वेगकरं वाक्यं सत्यं प्रियहितं च यत् । स्वाध्यायाभ्यसनं चैव वाङ्मयं तप उच्यते ॥१५॥
Sanskrit
anudvega-karaṁ vākyaṁ satyaṁ priya-hitaṁ ca yat svādhyāyābhyasanaṁ caiva vāṅ-mayaṁ tapa ucyate
Translation
Austerity of speech consists in speaking words that are truthful, pleasing, beneficial, and not agitating to others, and also in regularly reciting Vedic literature.