Can you describe the practice of giving Udi as a form of permission to leave Shirdi, based on the information in Chapter 33?

As narrated in Chapter 33 of the Shri Sai Satcharitra, giving Udi was an integral part of Sai Baba's interactions with His devotees, especially when they were departing from Shirdi. It was a well-known practice among all the devotees that when they sought Baba's permission to return to their villages, He would give them Udi. The chapter clarifies that when Baba said, "Take the Udi," it was understood as the true and final permission being granted. This act of receiving the sacred ash from Baba's hands would fill the devotees' hearts with enthusiasm and assurance for their journey home, signifying Baba's blessings and protection accompanying them.