Valmiki Ramayana Yuddha Kanda Sarga 71 Shloka 49

तदा then, बली powerful, महातेजाः extraordinary energetic, राक्षसेन्द्रात्मजः Rakshasa king's son, प्रतिभयम् in turn frightened, सौमित्रेः Saumithri's, चापनिर्घोषम् sound of his bow, श्रुत्वा hearing, विसिष्मिये astonished.

Then the extraordinarily energetic and powerful son of Rakshasa king was in turn frightened at the sound of Saumithri's bow and was astonished.