Valmiki Ramayana Kishkindha Kanda Sarga 43 Shloka 16
Original Shlokaमहत्सु तस्य शैलस्य निर्दरेषु गुहासु च। विचिनुध्वं महाभागां रामपत्नींततस्ततः।।4.43.16।।
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तस्य that mountain's, महत्सु mighty one's, शैलस्य mountain's, निर्दरेषु in caverns, गुहासु च in caves as well, महाभागाम् great lady, ततस्ततः everywhere, रामपत्नीम् Rama's wife, विचिनुध्वं search for.
'Look for that great lady, Rama's consort, in the big caves and caverns all over the mountain.