- Source: Pir Sadardin
Pir Sadardin, also known as Pir Sadrudin or Pīr Ṣadr al-Dīn, was a fourteenth-century Shia Ismaili Da'i who founded the Satpanth Tariqa and taught tolerance, perennialism and syncretism of all religions, putting a particular emphasis on the syncretism of Islam and Hinduism.
He was the son and successor of Pir Shihab ad-Din, and was one of the most prominent Ismaili authors of the 14th century. He was a contemporary of the Shia Ismaili Nizari Imam Muhammad ibn Islam Shah. Born in Persia, Sadardin later travelled to South Asia, settled in Sindh (in what is now southern Pakistan), and began to spread the Satpanth Tariqa in the area, as well as developing the Khojki script and writing Ginans. Pir Sadardin composed the previous Du'a, which was recited by Ismailis during several centuries, was very long and took almost half an hour to be recited. His "Gat Paj Ji Dua" also summarized the story of creation.
Pir Sadardin's Ginans were the last of the Ginans that have been studied today to mention Alamut and Daylam, suggesting that until this time, Ismaili presence – which is commonly thought to have been obliterated after the fall of Alamut to the Mongols in 1256 – had remained in the regions of Alamut and Daylam until his lifetime the 14th century. He authored an Ismaili book called Vinod.
He was buried in Taranda Muhamad Panah, an area not far from the holy town of Uch Sharif, Pakistan.