Valmiki Ramayana Aranya Kanda Sarga 27 Shloka 14

तेजस्वी mighty man, सन्नतपर्वभिः with those having strong joints, चतुर्भिः with four, शरैः with arrows, तस्य his, अस्य his (Rama's), तुरगान् swift, चतुरः four, वाजिनः horses, न्यपातयत threw down.

With four arrows having strong joints, the mighty hero (Rama) threw down his enemy's four swiftfooted horses.