Valmiki Ramayana Yuddha Kanda Sarga 111 Shloka 18

विसृष्टः loosed, महावेगः high velocity शरीरान्तकरः putting an end to the body, सःशरः that arrow, दुरात्मनः evil minded, तस्य his, रावणस्य Ravana's, हृदयम् heart, बिभेद split as under

Loosed at high velocity, that arrow capable of putting an end to the body, split as under the heart of evilminded Ravana