Valmiki Ramayana Yuddha Kanda Sarga 44 Shloka 6

दुष्पारे difficult to penetrate, तस्मिन् in that, तमसि darkness, क्रोधमूर्छिता lost senses overcome by anger, राक्षसाः Rakshasas, प्लवङ्गमान् monkeys, भक्षयन्तः devouring, महावेगाः swiftly, परिपेतुः wandered.

In that pitch darkness, which was difficult even to move, the Rakshasas overcome by anger and lost senses were wandering devouring the monkeys.