What is the significance of receiving Udi from Sai Baba before leaving Shirdi?

Receiving Udi from Sai Baba is profoundly significant as it serves as his explicit permission to depart. Chapter 35 explains that one should not leave Shirdi by their own will, as transgressing Baba's command can invite dreadful interruptions and obstacles on the way. The text states that after bowing and asking for permission, the blessing along with the Udi is the actual permission to leave. Therefore, receiving the Udi Prasad is an essential part of the departure process, ensuring a safe and blessed journey home, as it signifies that Sai's heart is pleased and you have his consent.