Valmiki Ramayana Yuddha Kanda Sarga 111 Shloka 16

सङ्क्रुद्धः very furious, सः he, कार्मुकम् bow, भृशम् fully, आयम्य stretched, परमायत्तः very well prepared, मर्मविदारणम् capable of tearing into vital parts, शरम् arrow, रावणाय on Ravana, चिक्षेप released

Rama, provoked by anger, stretched the bow to full length, very well prepared, released the arrow on Ravana, which was capable of tearing into the vital parts.