Shloka 25
Dāyavibhāga (Inheritance Apportionment) and Household Precedence — Dialogue of Yudhiṣṭhira and Bhīṣma
बन्धुभि: समनुज्ञाते मन्त्रहोमौ प्रयोजयेत् । तथा सिद्धयन्ति ते मन्त्रा नादत्ताया: कथंचन
bandhubhiḥ samanujñāte mantrahomau prayojayet | tathā siddhyanti te mantrā nādattāyāḥ kathaṃcana ||
毗湿摩说道：“当少女之亲族已表同意，方可施行婚礼之咒与随行之火供（homa）。唯有如此，这些真言才得以成就其效，完成其用。若少女未由其监护者依法交付成婚，则仪式中所用真言无论如何皆不成就——此等结合不被视为依吠陀仪轨而正当祝圣之婚姻。”
भीष्म उवाच
Educational Q&A
Ritual validity depends on rightful authorization: marriage mantras and homa are considered efficacious only when performed with the consent of the girl’s guardians/kinsmen and when she is duly ‘given’ in marriage; otherwise the rite is treated as not properly accomplished.
In Bhishma’s dharma-instruction discourse (Anushasana Parva), he lays down a rule about the proper performance of marriage rites, emphasizing consent and formal guardianship-based giving as prerequisites for the success of the Vedic mantras and homa.