Valmiki Ramayana Kishkindha Kanda Sarga 8 Shloka 43
Original Shlokaबलवान् हि ममामर्षश्श्रुत्वा त्वामवमानितम्। वर्तते हृदयोत्कम्पी प्रावृड्वेग इवाम्भसः4.8.43।।
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त्वाम् your, अवमानितम् insulted, श्रुत्वा after hearing, मम my, हृदयोत्कम्पी heart is agitated, बलवान् strong, आमर्षः restless, अम्भसः rain water, प्रापृड्वेग इव enraged , वर्तते feels
'On hearing about your humiliation I feel highly agitated at heart. I feel very much angry and restless like the water in rainy season.