Valmiki Ramayana Yuddha Kanda Sarga 93 Shloka 66

त्वम् you, अद्यैव in this way, कृष्णपक्षचतुर्दशीम् fourteenth day of the dark fortnight, अभ्युत्थानम् starting, कृत्वा doing, बलैः army, वृतः surrounded, अमावास्याम् on the fifteenth day, dark day, विजयाय victory, निर्याहि start

"Today being the fourteenth day of the dark fortnight, start on the next day that is the fifteenth dark day surrounded by the army and win."