Valmiki Ramayana Sundara Kanda Sarga 58 Shloka 73

जानक्या by Janaki, एवम् in that way, परुषम् harsh, उक्तः spoken, दशाननः tenheaded one, सहसा suddenly, चितास्थः in the funeral pyre, पावकः इव like fire, कोपात् in anger, जज्वाल like flame.

"Thus addressed harshly by Janaki, the tenheaded Ravana blazed up in anger suddenly like the flame of the funeral pyre.