Valmiki Ramayana Yuddha Kanda Sarga 76 Shloka 26

तेजस्वी full of vigour, प्रतापवान् courageous, सः he, वालिपुत्र Vali's son, संज्ञाम् regaining, प्राप्य hit, खङ्गेना by the sword, प्रजङ्घस्य Prajaghna's, शिरः head, कायात् his trunk, पातयत्क्षितौ made to fall down.

Son of Vali, who was full of vigour, on regaining consciousness hit Prajaghna on the head and trunk and made him fall down.