Mahabharata 7.87.19

अथ यान्रथिनो राजन्समन्तादनुपश्यसिएते रुक्मरथा नाम राजपुत्रा महारथाः

atha yānrathino rājansamantādanupaśyasiete rukmarathā nāma rājaputrā mahārathāḥ

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