Mahabharata 6.55.36

आविद्धनरनागाश्वं पतितध्वजकूबरम्अनीकं पाण्डुपुत्राणां हाहाभूतमचेतनम्

āviddhanaranāgāśvaṃ patitadhvajakūbaramanīkaṃ pāṇḍuputrāṇāṃ hāhābhūtamacetanam

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