Valmiki Ramayana Yuddha Kanda Sarga 4 Shloka 14
Original Shlokaसागरौघनिभं भीममग्रानीकं महाबलाः । कपिसिंहाः प्रकर्षस्तु शतशोऽथ सहस्रशः ।।6.4.14।।
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शतशः hundred, अथ this, सहस्रशः thousands, महाबलाः very powerful, कपिसिंहाः lions among vanaras, सागरौघनिभम् like the tides of the ocean भीमम् fierce, अग्रानीकम् leading, प्रकर्षन्तु would walk in groups.
"These hundreds and thousands of lionlike vanaras would walk in groups leading the army like the fierce tides of the ocean".