What is the significance of receiving Udi from Sai Baba, particularly when leaving Shirdi?

The Udi Prasad from Sai Baba holds immense significance, especially as a symbol of permission to depart from Shirdi. Chapter 35 explains that one must have Baba's permission to leave, as transgressing this command can invite obstacles and remorse. When a devotee bows and asks for leave, the blessing they receive along with the Udi is the actual permission. This practice underscores the belief that all movement, both arriving and departing, is under Sai's control and happens only when his heart is pleased. As stated in Chapter 35, after receiving the Udi Prasad and his blessing, devotees could return without doubt.