Valmiki Ramayana Kishkindha Kanda Sarga 53 Shloka 31
Original Shlokaस पूर्वं बद्धवैरो मां राजा दृष्ट्वा व्यतिक्रमम्।।4.53.31।। घातयिष्यति दण्डेन तीक्ष्णेन कृतनिश्चयः।
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पूर्वम् earlier, बद्धवैरः nursed bitter enmity, सः राजा that king, व्यतिक्रमम् lapse, दृष्ट्वा after seeing, कृतनिश्चयः decidedly, माम् me, तीक्ष्णेन with a severe, दण्डेन with punishment, घातयिष्यति he will inflict.
'The Monkeyking nursed bitter enmity against me even earlier. Now seeing my lapse, he will decidedly inflict severe punishment on me.