Shloka 40
तीर्थवंशोपदेशः
Tīrtha-vaṃśa Upadeśa: Instruction on the Fruits of Sacred Waters
विप्रस्थ रशना मौज्जी मौर्वी राजन्यगामिनी । बाल्वजी होव वैश्यस्य धर्म एष युधिष्ठिर,युधिष्ठिर! उपनयनके समय ब्राह्मणको मूँजकी, क्षत्रियको प्रत्यज्जाकी और वैश्यको शणकी मेखला धारण करनी चाहिये। यही धर्म है
viprasya raśanā mauñjī maurvī rājanyagāminī | bālvajī vāpi vaiśyasya dharma eṣa yudhiṣṭhira ||
毗湿摩说道：“尤提史提罗啊，受戒入门（upanayana）之时所系的腰带（mekhalā），婆罗门当用茅草（muñja）所制；刹帝利当用弓弦之纤维（maurvī）；吠舍当用亚麻/大麻之纤维（bālvajī）。此即既定之法（dharma）。”
भीष्म उवाच
Educational Q&A
Bhīṣma states a normative dharma-rule for the upanayana rite: each varṇa traditionally wears a specific material girdle, symbolizing disciplined entry into Vedic study and duty appropriate to one’s social role.
In the Anuśāsana Parva’s instruction on dharma, Bhīṣma answers Yudhiṣṭhira’s queries by detailing ritual prescriptions; here he specifies the proper initiation girdle materials for brāhmaṇa, kṣatriya, and vaiśya.