Valmiki Ramayana Aranya Kanda Sarga 3 Shloka 20
Original Shlokaतद्रामविशिखच्छिन्नं शूलं तस्यकराद्भुवि। पपाताशनिना छिन्नं मेरोरिव शिलातलम्।।3.3.20।।
1 source checked for this shloka
रामविशिखैः by Rama's arrow, छिन्नम् broken, तत् शूलम् spike, भुवि on the ground, अपतत् fell, अशनिना by the thunder, छिन्नम् broken into pieces, मेरोः of mount Meru, शिलातलम् इव like a slab, पपात fell down.
The spike, broken down by Rama's arrow, fell like a slab of mount Meru splintered by Indra's thunder.