Khara and Dūṣaṇa (Dushana), who dwelt in Janasthāna (Janasthan), sought revenge after Rāvaṇa’s (Ravana) sister Śūrpanakhā (Surpanakha) had her nose and ears cut off. Akampana was under their command. When Khara and Dūṣaṇa were killed by Rāma (Rama) and Lakṣmaṇa (Lakshmana), this demon named Akampana delivered the news of their death to Rāvaṇa. It was Akampana who apprised Rāvaṇa of Rāma and Lakṣmaṇa’s might, prowess and grace. Rāvaṇa, hearing everything, wished to go town to exterminate Rāma and Lakṣmaṇa. But Akampana told Rāvaṇa of Rāma and Lakṣmaṇa’s unmatched military skills and advised him not to engage in battle with them. He was the first to suggest that Rāvaṇa abduct the beautiful Sītā (Sita) instead and teach Rāmacandra (Ramachandra) a lesson. Rāvaṇa agreed to Akampana’s scheme and resolved to abduct Sītā.
Later on, during the savage war between Rāma and Rāvaṇa , Rāvaṇa sent out fierce demons accompanied by a fully-fledged army on the first day of the waxing moon in the month of Āśvina (Ashwina). Akampana led this army. He went to war with one akṣouhiṇī (akshouhini) soldiers, but died at the hands of Hanumāna (Hanumana), the son of Pavana, the Wind-God.
[Vṛhaddharmapurāṅa. 1.21.32-33]