Valmiki Ramayana Kishkindha Kanda Sarga 31 Shloka 27
Original Shlokaततस्ते हरयस्सर्वे प्राकारपरिघान्तरात्4.31.27।। निष्क्रम्योदग्रसत्त्वास्तु तस्थुराविष्कृतं तदा।
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ततः then, उदग्रसत्त्वाः with marked strength, सर्वे all, ते हरयः the monkeys, प्राकारपरिघान्तरात् crossing the ironboundary from beneath, निष्क्रम्य came out, तदा then, अविष्कृतम् made their appearance, तस्थुः stood.
The mighty monkeys came out of the entrance of the ironboundary wall from beneath and made their appearance and stood in full attention.