Valmiki Ramayana Sundara Kanda Sarga 21 Shloka 25
Original Shlokaइह शीघ्रं सुपर्वाणो ज्वलितास्या इवोरगा: ।।5.21.25।। इषवो निपतिष्यन्ति रामलक्ष्मणलक्षणाः।
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सुपर्वाणः well jointed arrows, शीघ्रं soon, ज्वलितास्याः with flaming fangs, उरगाः इव like the poisonous snakes, रामलक्ष्मणलक्षणाः marked with the names of Rama and Lakshmana, इषवः arrows, इह here, निपतिष्यन्ति will be raining.
"Arrows marked with Rama and Lakshmana will soon rain on Lanka like the poisonous snakes with flaming fangs.