Mahabharata 8.63.21

उभौ श्वेतहयौ राजन्रथप्रवरवाहिनौसारथी प्रवरौ चैव तयोरास्तां महाबलौ

ubhau śvetahayau rājanrathapravaravāhinausārathī pravarau caiva tayorāstāṃ mahābalau

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