Valmiki Ramayana Yuddha Kanda Sarga 58 Shloka 23

अथ and then, तत्र there, वीर्यवान् valiant one, कुम्भहनुः Kumbhahanu, तारेण by Tara, रणे in war, आसाद्य closed with, अभिहतः attacked, वृक्षेण by tree, मूर्ध्नि on the head, प्राणान् life, सन्त्याजयत् ceased.

And thereafter, valiant Tara closed with Kumbhahanu and attacked him with a tree on the head and he lost his life.