Valmiki Ramayana Yuddha Kanda Sarga 91 Shloka 57

तेन by then, परमाद्भुतम् very wonderful, तत् that, वारुणम् अस्त्रम् Varuna's weapon, विहतम् ineffective, ततः then, महातेजाः highly energetic, समितिञ्जयः victorious in wars, सः he, इन्द्रजित् Indrajith, लोकम् world, सङ्क्षिपन्निव as to destroy the whole world, दीप्तम् glowing, आग्नेयम् fire missile, सन्दधे used

Then the very wonderful weapon of Varuna was made ineffective by the highly energetic Indrajith's who used glowing fire missiles as if to destroy the whole world.