Valmiki Ramayana Yuddha Kanda Sarga 90 Shloka 39

अथ and then, सौमित्रिः Saumithri, राक्षससिंहस्य lion of Rakshasas, कनकभूषणान् decked in gold, कृष्णान् black, चतुरः four, हयान् horses, चतुर्भिः all the four, शरैः with shafts, विव्याध finished

Then Saumithri pierced with four shafts all the four black horses decked in gold, of the lion of Rakshasas (Indrajith) and finished them