Valmiki Ramayana Kishkindha Kanda Sarga 50 Shloka 12
Original Shlokaनानासत्त्वसमाकीर्णं दैत्येन्द्रनिलयोपमम्।।4.50.12।। दुर्दर्शमतिघोरं च दुर्विगाहं च सर्वशः।
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नानासत्त्वसमाकीर्णम् crowded with different kinds of creatures, दैत्येन्द्रनिलयोपमम् looked like the abode of king of the demons, दुर्दर्शम् fearful to look at, अति घोरम् highly dreadful, सर्वशः all over, दुर्विगाह्यं च and inaccessible.
The cave was crowded with creatures of different kinds. It looked like the abode of the king of demons difficult (to enter), dreadful and impenetrable.