Valmiki Ramayana Ayodhya Kanda Sarga 16 Shloka 31

आकाशे in the sky, पर्जन्य इव like stormcloud, स्वनवान् sonorous, श्रीमान् magnificent, सः he (that chariot), अभिनादयन् making sound, महाभ्रात् from a huge cloud, चन्द्रमा इव like moon, निकेतात् from the residence, निर्ययौ departed.

The magnificent chariot, rumbling like a stormcloud in the sky, emerged from (Rama's) residence like the Moon peeping through a huge cloud.