ततः then, महातेजाः highly energetic, वीर्यवान् valiant one, रामः Rama, धनुः bow, आदाय taking up, राक्षसम् Rakshasas, सैन्यम् army, प्रविश्यentered, शरवर्षम् rain of arrows, ववर्ष ह showered

Then, the highly energetic and valiant Rama, taking up the bow showered rain of arrows on Rakshasa army.