What is the significance of receiving Udi when seeking permission to leave Shirdi?

According to the teachings in Chapter 35, one cannot simply leave Shirdi at will, as departing without Sai Baba's permission is considered a transgression that invites obstacles and remorse. The text clarifies that a devotee must first ask for permission to depart. The sign that this permission has been granted is when Baba gives his blessing along with the Udi Prasad. Therefore, receiving the Udi is not merely a parting gift but is the actual, tangible permission to leave, which is only bestowed when Sai's heart is pleased with the devotee.