Valmiki Ramayana Yuddha Kanda Sarga 31 Shloka 27

अथ and, जानुभ्याम् on the knees, उत्पतन् while rising up, जाम्बवान् Jambavan, युधि in combat, निहातः fallen down, बहुभिः many, पट्टसै: iron bars, छिन्नः struck, पादपोयथा like a tree, छिन्नः broken down.

And while Jambavan was rising on his knees, he was struck by many iron bars in comb at and had fallen down like a tree.