Ananda Ramayana

Its primary significance, however, is its inclusion of original stories that are intended to provide background information for the Valmiki Ramayana narrative.

Enraged, Ravana abducted Kausalya immediately prior to her wedding, and placed her in a box on a deserted island in the middle of the ocean.

Unaware of these events, Ravana went to Brahma and told him that his prediction had been rendered false, as he had killed Dasharatha and was holding Kausalya captive in the box.

Ravana eventually returned to Gokarna to perform the intense tapas, which later earned him the boons from Brahma that made him invincible to everyone but humans.

Hanuman was delayed, however, but because the muhurta (auspicious time for an event) was about to pass, Rama formed a linga made of sand and consecrated it instead.