Valmiki Ramayana Yuddha Kanda Sarga 61 Shloka 39
Original Shlokaरामवाक्यमुपश्रुत्य हरयो जितकाशिनः । पादपैरर्दयवनीरावानराःपरवाहिनीम् ।।6.61.39।।
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जितकाशिनः desiring to be triumphant, हरयः monkeys, रामवाक्यम् Rama's command, उपश्रुत्य hearing, वीराः heroes, वानराः Vanara, पादपैः trees, परवाहिनीम् enemies, अर्धयन् began to strike.
The monkeys desiring to be triumphant, took trees and began to strike at the enemies on hearing Rama's control.