Buddha made his second visit to Sri Lanka.

It was on the Bak Full Moon Poya Day (Purnima) that the Buddha made his second visit to Sri Lanka. During the fifth year of his Enlightenment the Buddha saw with His divine eye that a dispute had arisen between two Naga kings Chulodara and Mahodara.

Mahodara was a king in Nagadeepa. His younger sister Thirachchika was married to a Naga king. Chulodara was their son. Thirachchika's father gave her one of his most valuable jewels – a gem-studded throne prior to his death.

According to the Mahavamsa, the Buddha appeared in the sky under the shade of a kiripalu tree to settle the dispute between Chulodara and Mahodara who were uncle and nephew. They were fighting over the ownership of a gem-studded throne.

A Deva named Samiddhi Sumana who dwelt in a Rajayatana (banyan) tree in Jetawana too had joined the Buddha during His visit to Nagadeepa. Buddhist history reveals that the Deva had uprooted the tree and held it like a parasol over the Buddha.

The Buddha arrived in Nagadeepa before the two factions of Nagas had launched themselves in to battle. The Buddha hovered over them in mid air, creating darkness over the battleground.

The Nagas were overwhelmed with happiness to see the Buddha who was hovering in mid air. They worshipped the Enlightened One. The Buddha preached to the Nagas to make them understand the evils of hatred.

(Ref.)