Valmiki Ramayana Aranya Kanda Sarga 64 Shloka 51

एषा this, व्यक्तम् it is certain, कस्यापि some one's, पुरुषस्य man's, रक्षसः demon's, पदवी path, मम for me, जीवितान्तकम् till the end of my life, शतगुणम् hundred times, इदं वैरम् enmity like this, पश्य see.

This indeed is the path the man or the demon has traversed. My enmity with him now has become hundredfold. This will end only with the extermination of his life.