Valmiki Ramayana Yuddha Kanda Sarga 58 Shloka 15

राक्षसौघाः Rakshasas in groups, सङ्क्रुद्धैः highly enraged, वानरैः by Vanaras, समन्ततः completely, पादपैः trees, गिरिशृङ्गैश्च and mountain peaks, वसुधातले on the earth's surface, सम्पिष्टाः crushed.

Then the highly enraged Vanaras completely crushed Rakshasas in groups by crushing them on the earth's surface with trees and mountain peaks.