Canto 3 -
Araṇya-kāṇḍa
Chapter 21: Śūrpaṇakhā Impels Khara to Attack Rāma
When Śūrpaṇakhā returned to Khara and cried, he consoled her and asked her why she was crying. She informed him that Rāma had killed the rākṣasas sent by him and harshly impelled him to attack Rāma.