Valmiki Ramayana Yuddha Kanda Sarga 73 Shloka 54
Original Shlokaस्वसैन्यमुत्सृज्यसमेत्यतूर्णंमहारणेवानरवाहिनीषु । अदृश्यमानश्शरजालमुग्रंववर्षनीलाम्बुधरोयथाम्बु ।।6.73.54।।
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स्वसैन्यम् his own army, उत्सृज्य leaving, तूर्णम् moving swiftly, महारणे great battle, समेत्य staying, अदृश्यमानः concealed, वानरवाहिनीषु from Vanara army, उग्रम् sharp, शरजालम् arrows of net, नीलाम्बुधरः from the blue sky, अम्बुयथा like rainy cloud, ववर्ष rained.
Leaving from his own army space, moving swiftly, remaining concealed in the blue sky like a rain cloud, Indrajith rained a net of arrows.