Based on Chapter 4, what were some of the key experiences that led Das Ganu to compose a song about Sai Baba's power?

Das Ganu's song was inspired by several profound experiences that revealed Sai Baba's divine nature. According to Chapter 4, one major event was when he desired to bathe in the holy Prayag. Baba denied him permission to travel, stating that Shirdi itself was Prayag, and then miraculously manifested streams of Ganga and Yamuna water from His own toes. This overwhelming miracle caused Das Ganu's speech to become inspired and his love to overflow. He had also been told by Baba to organize a Name-week with the promise that Vitthal would appear, which came to pass. These leelas, which showcased Baba's unfathomable power and divine identity, moved Das Ganu so deeply that he composed a song in praise of Baba's glory.