Valmiki Ramayana Aranya Kanda Sarga 42 Shloka 19
Original Shlokaक्षणेन राक्षसो जातो मृगः परमशोभनः।।3.42.19।। वनं प्रज्वलयन्रम्यं रामाश्रमपदं च तत्।
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राक्षसः the demon, वनम् forest, रम्यम् beautiful, तत् रामाश्रमपदम् that Rama's hermitage, प्रज्वलयन् while brightening, क्षणेन in a moment, परमशोभनः very beautiful, मृगः deer, जातः was transformed.
Transformed into a most beautiful deer in a moment, Maricha brightened the beautiful forest and Rama's hermitage.