Valmiki Ramayana Yuddha Kanda Sarga 52 Shloka 13

वनौकसाम् monkeys, पर्वताग्रैः from mountain tops, मथितैः crushed, पर्वताकारैः like mountains in form, गजेन्द्रैः elephants, सारोहैः riders, वाजिभिः horses, वसुधातलम् surface of the ground, कीर्णम् covered.

By the Vanaras hurling from the mountains, the crushed elephants were like mountains and the horses with riders crushed covered the ground all over.