The sundara kanda forms the heart of Valmiki's Ramayana and consists of a detailed, vivid account of Hanuman's adventures. After learning about Sita, Hanuman assumes a gargantuan form and makes a colossal leap across the ocean to Lanka. Here, Hanuman explores the demon's city and spies on Ravana. He locates Sita in ashoka grove, who is wooed and threatened by Ravana and his rakshasis to marry Ravana. He reassures her, giving Rama's signet ring as a sign of good faith. He offers to carry Sita back to Rama, however she refuses, reluctant to allow herself to be touched by a male other than her husband. She says that Rama himself must come and avenge the insult of her abduction.