What happened when the two gentlemen from Goa came for Sai Baba's darshan, and why was his behavior confusing to others?

According to Chapter 36 of the Shri Sai Satcharitra, when two gentlemen from Goa visited Sai Baba, a peculiar event unfolded. Both men surrendered at Baba's feet, but Baba's interaction with them was different. He specifically asked for and accepted a Dakshina of fifteen rupees from one of the men. However, when the second man voluntarily offered thirty-five rupees, Baba immediately rejected it. This action was perplexing to everyone present, including his devotee Shama, who questioned this apparent partiality, wondering why Baba would accept a smaller sum from one friend while refusing a larger offering from the other.