Valmiki Ramayana Aranya Kanda Sarga 4 Shloka 31
Original Shlokaतदेव रामेण निशम्य भाषितं कृता मतिस्तस्य बिलप्रवेशने। बिलं च रामेणातिबलेन रक्षसा प्रवेश्यमानेन वनं विनादितम्।।3.4.31।।
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तत् then, भाषितमेव words spoken, निशम्य hearing, रामेण by Rama, तस्य his, बिलप्रवेशने putting him in the pit, मतिः mind, कृता determined, बिलम् pit, प्रवेश्यमानेन while placing, अतिबलेन mighty, रामेण by Rama, रक्षसा by the demons, वनम् forest, विनादितम् echoed.
While Rama, who had made up his mind after hearing him, was putting the mighty demon in the pit, the forest rang with his roar.