Valmiki Ramayana Aranya Kanda Sarga 31 Shloka 35
Original Shlokaस रथो राक्षसेन्द्रस्य नक्षत्रपथगो महान्। सञ्चार्यमाणश्शुशुभे जलदे चन्द्रमा इव।।3.31.35।।
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राक्षसेन्द्रस्य of the king of demons, सञ्चार्यमाणः as he was going, नक्षत्रपथगः in the sky, महान् great, सः he, रथः chariot, जलदे in the clouds, चन्द्रमाः इव like the Moon, शुशुभे shone.
The great chariot of the demon king (Ravana) flying in the sky shone like the Moon in the cloud.