Valmiki Ramayana Yuddha Kanda Sarga 43 Shloka 24

क्षिप्रहस्तेन as if consuming monkey troops, रक्षसा Rakshasa, तीक्ष्णैः sharp, शरैः arrows, भिन्नगात्रः opening his throat, वानराधिपः Vanara leader, सुग्रीवः Sugriva, सैन्यानि army, ग्रसन्तमिव as if swallowing, प्रघसम् Praghasan, सप्तपर्णेन Sapataparni, जघानच hit speedily, निर्भिभेद and killed.

Sugriva, the Vanara leader, taking hold of Sapataparni tree hit Pratapan who had his mouth open as if to swallow the army and killed him.