Valmiki Ramayana Yuddha Kanda Sarga 59 Shloka 67

ततः then, मारुतिवाक्येन consequent to Maruti's words, तदा then, तस्य his, कोधः anger, अज्वलत् burning, संरक्तनयनः red eyes, यत्नात् effort, दक्षिणम् right, मुष्टिम् fist, उद्यम्य lifting, वीर्यवान् powerful, वेगेन instantly, वानरोरपि Vanara's enemy, पातयामास brought down.

Consequent to Maruti speaking like that, Ravana's eyes turned red, burning with anger. The powerful Ravana lifted his right fist instantly and brought it down on his powerful enemy.