The Pir Davidan shrine is located in the village of Pirdavidan in the Qafan region. According to some authors, the grave of Javidan (807–816), the leader of the Khurramis movement, is located here. Prominent Azerbaijani writer Mammad Said Ordubadi, in his work "Bloody Years" (“Qanlı sənələr”), describes how the Armenians devastated the village of Pirdavidan in 1905. He notes that the mausoleum of Pir Davidan is associated with Davud, brother of Imam Rza. Sultan Davud is a descendant of Jafar Sadiq, the sixth Imam of the Shia. Sources indicate that Musa al-Kazim had 40 children—23 sons and 17 daughters. Imam Ali Rza was his first son, and Davud was his twenty-second son. Ali Rza is the eighth Imam of the Shia Muslims, and his grave is currently a pilgrimage site located in Mashhad. Imam Rza’s younger brother, Davud, was buried in the territory of Qafan, and his grave was transformed into a sacred shrine known as Pir Davidan, meaning "Shrine of Davud."