Valmiki Ramayana 7.23.22

ददर्श रावणस्तत्र गोवृषेन्द्रवरारणिम् ।यस्माच्चन्द्रः प्रभवति शीतरश्मिर्निशाकरः॥

dadarśa rāvaṇastatra govṛṣendravarāraṇim |yasmāccandraḥ prabhavati śītaraśmirniśākaraḥ ||

Our plain-language meaning of this verse is waiting for scholar review.