What is the crucial rule for pilgrims in Shirdi regarding their departure, as highlighted in Chapter 9?

The most crucial rule for pilgrims, which Chapter 9 describes as a specific characteristic of the Shirdi pilgrimage, revolves around obtaining Sai Baba's permission to leave. The chapter makes it very clear that if a pilgrim departs without Baba’s permission, they are inviting obstacles and difficulties for themselves. The rule has a second part: once Baba gives his permission to go, the devotee should not delay and must leave promptly. Staying longer, even for a moment, after receiving permission is also said to bring trouble upon one's head. The text notes that many devotees had experienced the consequences of not following this two-fold directive precisely.