Canto 3 -
Araṇya-kāṇḍa
Chapter 72: Kabandha Tells Rāma About Sugrīva
Rāma and Lakṣmaṇa placed Kabandha’s body on a pyre and set fire on it. The soul of Kabandha then flew out of that pyre in a celestial body. Standing on a celestial chariot yoked to horses in the sky, he informed Lord Rāma about Sugrīva and told Him to go to Ṛśyamūka mountain and make friends with Sugrīva, who would then search for Sītā-devī with the help of his assistant monkeys.