Tell me the story about Baba asking Dada Kelkar to buy meat on a fasting day. What was the point of that test?

Chapter 38 recounts an incident where Sai Baba gave a surprising order to Dada Kelkar, a respected Brahmin devotee who was perfect in his conduct and thoughts. On Ekadashi, a fasting day, Baba gave Dada Kelkar money and ordered him to personally go and fetch some meat. For Dada Kelkar, who had boundless love for Sai's feet, this order was a "novelty." The text uses this story to illustrate a deeper spiritual principle: the performance of a Guru's order is the real "Dakshina" or offering. It suggests that a disciple's faith is tested in their ability to follow the Guru's command without doubt, as this surrender is crucial for spiritual progress.