Mahabharata 12.1.23

यं सूतपुत्रं लोकोऽयं राधेयं चाप्यमन्यतस ज्येष्ठपुत्रः कुन्त्या वै भ्रातास्माकं च मातृजः

yaṃ sūtaputraṃ loko'yaṃ rādheyaṃ cāpyamanyatasa jyeṣṭhaputraḥ kuntyā vai bhrātāsmākaṃ ca mātṛjaḥ

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