Can you recount the story of the two gentlemen from Goa and the surprising event that happened with their Dakshina?

Certainly. Chapter 36 narrates an incident involving two gentlemen from Goa who came for Sai Baba's darshan. Upon their arrival, both surrendered at his feet. In a curious turn of events, Baba asked for Dakshina of fifteen rupees from only one of the men, which the man gave with joy. The second gentleman, unprompted, attempted to offer thirty-five rupees on his own accord. However, Sai Baba immediately rejected this offering. This act of apparent partiality was so unusual that it caused great surprise among all the onlookers, including Madhavrao (Shama), who felt compelled to ask Baba for an explanation.