Valmiki Ramayana Sundara Kanda Sarga 2 Shloka 37
Original Shlokaकेनोपायेन पश्येयं मैथिलीं जनकात्मजाम्। अदृष्टो राक्षसेन्द्रेण रावणेन दुरात्मना।।5.2.37।।
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दुरात्मना evilminded, राक्षसेन्द्रेण by lord of demons, रावणेन by Ravana, अदृष्टः without being seen, केन for that, उपायेन means, जनकात्मजाम् Janaka's daughter, मैथिलीम् Mythili, पश्येयम् will be possible to find.
'By what means can I find Mythili, daughter of Janaka, without being noticed by the evilminded Ravana, the lord of demons?