Valmiki Ramayana Kishkindha Kanda Sarga 6 Shloka 18
Original Shlokaहृदि कृत्वा तु बहुशस्तमलङ्कारमुत्तमम्। निशश्वास भृशं सर्पो बिलस्थ इव रोषितः।।4.6.18।।
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सः he, उत्तमम् excellent, तम् अलङ्कारम् her ornaments, बहुशः again and again, हृदि on his chest, कृत्वा held, रोषितः in anger (sorrow), बिलस्थः in the hole, सर्पः इव like a snake, भृशम् intensely, निशश्वास sighed
Pressing the excellent ornaments to his bosom again and again Rama hissed like a cobra provoked in its anthill.