Valmiki Ramayana Sundara Kanda Sarga 64 Shloka 22

सर्वे all, ते हरियूथपाः vanara troops, यन्त्रोत्क्षिप्ताः stones shattered by machines, अचलाः mountain, इव like, आकाशम् sky, निराकाशम् as if there is no sky, कृत्वा did, उत्पतन्तम् rising up, अनूत्पेतुः sprang up.

All the vanara troops sprang up into the air as though there was no sky, like stones shattered by machines from the mountains rise up.