Can you recount the story of Dev's feast and how Baba's promise was fulfilled in an unexpected way?

Certainly. The story from Chapter 40 tells of a devotee named Dev who was holding a religious feast, or Udyapan. He invited Baba, who promised to attend with two others. On the day of the event, Dev waited expectantly, but Baba did not appear in his familiar form. Instead, a Sanyasi with two companions arrived uninvited. Though Dev served them a meal, he felt dejected and wrote a letter to his friend Jog, complaining that Baba had deceived him. Jog presented the matter to Baba, who then revealed his divine play. Baba confirmed he had been the Sanyasi, stating, "for the sake of My word, I would die; but the words from My mouth shall never be otherwise." Upon hearing this, Dev was filled with shame for his doubt and awe at Baba's mysterious ways.