Valmiki Ramayana 6.90.36

रुधिरौघमहानद्यः प्रावर्तन्त सहस्रशः।क्रव्यादा दारुणा वाग्भिश्चिक्षिपुर्भीमनिस्वनम्॥

rudhiraughamahānadyaḥ prāvartanta sahasraśaḥ |kravyādā dāruṇā vāgbhiścikṣipurbhīmanisvanam ||

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