Valmiki Ramayana Kishkindha Kanda Sarga 37 Shloka 24

विन्ध्यात् from the Vindhya, अङ्गारकसमानानाम् like the Angaraka (fire), भीमानाम् fierceful, भीमकर्मणाम् of fierce deeds, वानरकोटीनाम् of crores of monkeys, सहस्राणि thousands, द्रुतम् swiftly, अपतन् came down.

From the Vindhya mountain came down thousands of crores of swiftfooted monkeys of terrific deeds. They were fierce like fire (Angaraka).