Valmiki Ramayana Yuddha Kanda Sarga 19 Shloka 11

राम: Rama, येन: on which account, कैलासे: in Kailasa, सङ्ग्रामे: in combat, मणिभद्रः Manibhadra, पराजितः defeated, तस्यसेनापतिः his army chief, प्रहस्तः Prahastha, ते: you, श्रुतःयदि: might have heard.

"Rama You might have heard of Prahastha who the commander in chief of his (Ravana's) army is by whom Manibhadra (Kubera's Commander of Army) was defeated in a comb at in Kailas (the abode of Siva)."