Mahabharata 13.49.25

अथ देया तु कन्या स्यात्तद्वर्णेन युधिष्ठिरसंस्कर्तुं मातृगोत्रं च मातृवर्णविनिश्चये

atha deyā tu kanyā syāttadvarṇena yudhiṣṭhirasaṃskartuṃ mātṛgotraṃ ca mātṛvarṇaviniścaye

Our plain-language meaning of this verse is waiting for scholar review.