Valmiki Ramayana Yuddha Kanda Sarga 74 Shloka 39
Original Shlokaतस्मिन् सम्पीड्यमानेतुभग्नद्रुमशिलातले । न शेकुर्वानरास्स्थातुंघूर्णमानेनगोत्तमे ।।6.74.39।।
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सम्पीड्यमाने began to get oppressed, भग्नद्रुमशिलातले trees and rocks broken, तस्मिन् नगोत्तमे that foremost of mountain, घूर्णमाने crushed, वानराः Vanaras, स्थातुम् to stand, न शेकुः not possible.
As the foremost of the mountain got oppressed it crushed the trees and rocks on it and Vanaras were unable to stand on it.