Valmiki Ramayana Aranya Kanda Sarga 30 Shloka 21
Original Shlokaतस्य बाणान्तराद्रक्तं बहु सुस्राव फेनिलम्। गिरेः प्रस्रवणस्येव तोयधारापरिस्रवः।।3.30.21।।
1 source checked for this shloka
तस्य his, फेनिलम् foamy, बहु a lot, रक्तम् blood, बाणान्तरात् by the arrows piercing, गिरेः of the mount, प्रस्रवणस्य Prasravana's, तोयधारपरिस्रवः इव like the waterfalls from the mountain, सुस्राव came out.
With his body pierced with arrows his blood started flowing like the waterfalls flow from mount Prasravana.