Mahabharata 8.7.5
नागानां कल्पमानानां रथानां च वरूथिनाम्संनह्यतां पदातीनां वाजिनां च विशां पते
nāgānāṃ kalpamānānāṃ rathānāṃ ca varūthināmsaṃnahyatāṃ padātīnāṃ vājināṃ ca viśāṃ pate
Our plain-language meaning of this verse is waiting for scholar review.