Canto 3 -
Araṇya-kāṇḍa
Chapter 31: Rāvaṇa’s Conversation with Akampana and Mārīca
A rākṣasa named Akampana reached Laṅkā and informed Rāvaṇa that Śrī Rāma had vanquished Khara and all the other rākṣasas. When Rāvaṇa declared that he would kill Rāma and got ready to go to Janasthāna, Akampana described Rāma’s glories, stated that He cannot be killed by anyone and told Rāvaṇa that Rāma can be killed by kidnapping Sītā away from Him. Rāvaṇa then went to Mārīca’s āśrama, informed him that Rāma had killed Khara and other rākṣasas and sought his assistance to kidnap Sītā. Mārīca informed Rāvaṇa about Rāma’s capabilities, and after pointing out that He cannot be conquered by anyone, sent Rāvaṇa back to Laṅkā.