Valmiki Ramayana Ayodhya Kanda Sarga 6 Shloka 27
Original Shlokaजनौघैस्तैर्विसर्पद्भिः शुश्रुवे तत्र निस्वनः। पर्वसूदीर्णवेगस्य सागरस्येव निस्वनः।।2.6.27।।
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विसर्पद्भि: by those moving to and fro, तैः जनौघैः by those multitudes of men, तत्र there, निस्वनः noise, पर्वसु on the full and new moon days, उदीर्णवेगस्य with violent speed, सागरस्य of the ocean, निस्वनः इव like the sound, शुश्रुवे was heard.
The multitudes of men moving to and fro gave rise to a noise like the roar of the ocean enhanced by the violent speed (of the wind) on the full and new moon days.