Valmiki Ramayana Yuddha Kanda Sarga 7 Shloka 12
Original Shlokaअक्षयाबलवन्तश्चशूरालब्धवराःपुनः । त्वयासंवत्सरंयुद्ध्वासमरेदानवाविभो ।।6.7.12।।
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अक्षया: imperishable, बलवन्तश्च: strong and mighty, शूरा: warriors, लब्धवराः who had obtained boon, त्वया: by you, संवत्सरं: one year, युद्ध्वा: fighting, पुनः again, समरे: in war, दानवा: Danavas, विभो: Oh Lord.
"The mighty and strong Danava warriors who had obtained boon were made to fight a war by you for one year."