Valmiki Ramayana Kishkindha Kanda Sarga 37 Shloka 14

मेघपर्वतसङ्काशाः those comparable to clouds and mountains, घोररूपाः fierce in appearance, कपिश्रेष्ठाः best of monkeys, अम्बरम् sky, छाहोदयन्त इव as if covering, मच्छासनात् by my command, इतः from here, यान्तु will go.

'Fierce monkeys, comparable to clouds and mountains in appearance shall go as though covering the sky from here at my command.