Valmiki Ramayana Yuddha Kanda Sarga 76 Shloka 87

तस्य his, चर्म च armour, पुस्फोट slit open, शोणितं blood, बहुसुस्राव flowed excessively, महावेगः at high speed, सःमुष्टिः his fist, अस्थिमण्डले skeletal framework, प्रतिजघ्ने in return struck.

The armour of Sugriva slit open, and blood flowed at high speed and excessively. The first hit of Kumbha hit the skeletal framework of Sugriva in return.