Valmiki Ramayana Yuddha Kanda Sarga 24 Shloka 3
Original Shlokaततश्शुश्रुवुराक्रुष्टंलङ्कायांकाननौकसः । भेरीमृदङ्गसङ्घुष्टंतुमुलंरोमहर्षणम् ।।6.24.3।।
1 source checked for this shloka
ततः there upon, काननौकसः army having settled, लङ्कायां from Lanka, आक्रुष्टम् terrific, तुमुलम् tumultuous, रेमहर्षणम् that which causes horripilation, भेरीमृदङ्गसङ्घुष्टम् drums and percussion instruments, शुश्रुवुः came to hear.
There upon having settled down, the army hordes heard from Lanka terrific and tumultuous noise of drums and percussion instruments that caused horripilation.