Besides the rules for leaving Shirdi, what spiritual purpose did Sai Baba's daily act of begging for food serve, as explained in Chapter 9?

Chapter 9 explains that Sai Baba's lifelong habit of begging for food had a profound spiritual purpose beyond mere sustenance. The text explicitly states that he followed this practice until the very end of his life for the welfare of his devotees. Specifically, it was for the removal of sins, including the 'Panchasuna'—sins inadvertently committed in daily household life. Therefore, as Chapter 9 clarifies, this daily ritual was not a sign of poverty but a merciful act by Baba to help his followers achieve spiritual purification and well-being, demonstrating his selfless nature and constant concern for his flock.