Valmiki Ramayana Yuddha Kanda Sarga 31 Shloka 33
Original Shlokaहरयोमथितानागैरथजातैस्तथापरे । शयितामृदिताश्चाश्वैर्यायुवेगैरिवाम्बुदाः ।।6.31.33।।
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तत्र there, शयिता: sleeping ones, अपरे some, हरयः Vanaras, नागैः by elephants, तथा so also, रथजातैः by mass of clouds, वायुवेगैः by the speed of wind, अम्बुदाःइव like the clouds, मृदिताः are dead.
"There, some of the sleeping Vanaras were crushed by elephants, so also, just as by the speed of wind the clouds are crushed the Vanaras are crushed to death."