Shloka 25
Jñāna-yoga and Karma-phala: Manu–Bṛhaspati on Akṣara and the Limits of Mantra
त्वंकारं नामधेयं च ज्येष्ठानां परिवर्जयेत् । अवराणां समानानामुभयेषां न दुष्यति,अपनेसे बड़ोंका नाम लेकर या तू कहकर न पुकारे, जो अपनेसे छोटे या समवयस्क हों, उनके लिये वैसा करना दोषकी बात नहीं है
tvaṃkāraṃ nāmadheyaṃ ca jyeṣṭhānāṃ parivarjayet | avarāṇāṃ samānānām ubhayeṣāṃ na duṣyati ||
毗湿摩说道：对长者不可直呼其名，亦不可用亲昵的“你”(tvaṃ)相称。至于年少于己者或同龄者，使用此类称呼对双方皆不算过失。此教诲强调：敬语乃社会行持中对法（dharma）的切实体现。
भीष्म उवाच
Educational Q&A
Respectful speech is part of dharma: do not address elders by name or with overly familiar ‘tvaṃ’; with juniors or equals, such address is not inherently blameworthy.
In Śānti Parva’s instruction on righteous conduct, Bhīṣma lays down a rule of etiquette and moral discipline regarding how one should speak to elders, equals, and juniors.