Mahabharata 8.19.54

पादातैराहता नागा विवरेषु समन्ततःचक्रुरार्तस्वरं घोरं व्यद्रवन्त दिशो दश

pādātairāhatā nāgā vivareṣu samantataḥcakrurārtasvaraṃ ghoraṃ vyadravanta diśo daśa

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