They were killed for neglecting their duty to provide a brick each thus leaving gaps in Taungbyone Pagoda, which was built by King Anawrahta.
[1][2] After death, the brothers became spirits and manifested themselves in front of King Anawrahta, requesting apaing-za (possession) of territory.
However, when she didn't reciprocate, he ordered his mount tiger to kill her, and she became a nat after a violent death.
[6] Worshippers of this nat avoid consumption of pork, as Shwe Hpyin Gyi's father, Byatta, is believed to have been an Indian Muslim.
Thousands of festive worshippers gather for the event, engaging in dance with spirit mediums, enjoying roadside snacks, and shopping for souvenirs.