Mahabharata 8.18.54

व्यावर्तये तत्र रथं नदीवेगमिवार्णवात्अवध्यं ब्राह्मणं मन्ये येन ते विक्रमो हतः

vyāvartaye tatra rathaṃ nadīvegamivārṇavātavadhyaṃ brāhmaṇaṃ manye yena te vikramo hataḥ

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