What is the primary rule for pilgrims regarding their departure from Shirdi, as explained in Chapter 9?

According to Chapter 9 of the Shri Sai Satcharitra, a defining characteristic of a Shirdi pilgrimage is the absolute necessity of obtaining Sai Baba's permission before departing. The text explicitly warns that if a pilgrim leaves without his consent, they invite obstacles and trouble. Conversely, once Baba grants permission to leave, the devotee should not stay in Shirdi for even a moment longer, as doing so also brings trouble. This principle underscores the importance of adhering strictly to Baba's timing for the devotee's own welfare, a lesson many experienced firsthand.