At the location of the present Wat Chedi, Nakhon Si Thammarat, the famous teacher in the southern area had traveled back from Krung Si Ayutthaya and stayed overnight in this area. Ai Khai was about 9-10 years old. He was the disciple that pursued Luang Phu Thuad. When Luang Phu Thuad arrived at this place, he had found many treasures. The religious place was an important place. He had asked Ai Khai to dwell here to watch over these treasures and the place. The name of the village was later changed to “Moo Ban Pho Sadet” until the present. According to the tale, it had emphasized that the word “Satcha” was very important that was ever experienced and seen. When making any vows, bring that thing to fulfill the vow according to the statement of “Kho Dai Wai Rup”.