Valmiki Ramayana Yuddha Kanda Sarga 69 Shloka 22
Original Shlokaहयोत्तमसमायुक्तंसर्वायुधसमाकुलम् । आरुरोहरथश्रेष्ठंत्रिशिरारावणात्मजः ।।6.69.22।।
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रावणात्मजः Ravana's brother, त्रिशिराः Trisira, हयोत्तमसमायुक्तम् best of horses, सर्वायुधसमाकुलम् with all kinds of weapons, रथश्रेष्ठम् best of chariots, आरुरोह mounted.
Ravana's brother, Trisira went mounted on a chariot yoked to the best of horses with all kinds of weapons.