Valmiki Ramayana Yuddha Kanda Sarga 91 Shloka 53
Original Shlokaसन्निपातस्तयोश्चासीच्छरयोर्घोररूपयोः ।।6.91.53।। सधूमविस्फुलिङ्गश्चतज्जोऽनगिर्दारुणोऽभवत् ।
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घोररूपयोः formidable form, तयोः those two शरयोः arrows, सन्निपातः rubbed against each other, सधूमविस्फुलिङ्गः fierce fire with smoke, आसीत् came out, तज्ञःsparks, अग्नी: fire, दारुणः fear, अभवत् created
By the impact of the two arrows brought together, a formidable form of fire frightening with smoke and sparks was created.