Valmiki Ramayana Yuddha Kanda Sarga 89 Shloka 2
Original Shlokaतस्यज्यातलनिर्घोषं स श्रुत्वाराक्षसाधिपः । विवर्णवदनोभूत्वालक्ष्मणंसमुदैक्षत ।।6.89.2।।
1 source checked for this shloka
सः he, राक्षसाधिपः Lord of Rakshasas, तस्य his, ज्यातलनिर्घोषम् the sound of bow string, श्रुत्वा hearing, विवर्णवदनः pale faced, भूत्वा, लक्ष्मणम् Lakshmana, समुदैक्षत looked at
On hearing the sound of the bow string of Laksmana the Lord of Rakshasa became pale in face and looked at Lakshmana.