Valmiki Ramayana Kishkindha Kanda Sarga 43 Shloka 30
Original Shlokaस च सर्वैर्विचेतव्यस्ससानुप्रस्थभूधरः। क्रौञ्चं गिरिमतिक्रम्य मैनाको नाम पर्वतः।।4.43.30।।
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ससानुप्रस्थभूधरः the mountain including its plain lands and ridges, सः that mountain, सर्वैः by all of you, विचेतव्यः it has to be searched, क्रौञ्चं गिरिम् Krauncha mountain, अतिक्रम्य after passing, मैनाको नाम called Mainaka, पर्वतः mountain.
'Beyond mount Krauncha you will find Mainaka. All of you should search for Sita in the plain lands and the ridges of the mountain.