How did Sai Baba demonstrate his omniscience to the Dhurandhar brothers during their visit to Shirdi?

Sai Baba's omniscience was clearly demonstrated when the Dhurandhar brothers visited him, an event described in Chapter 51. Before the brothers even arrived in Shirdi in April 1912, Baba announced to those present, "Today many of my court-people are going to come here." The Dhurandhar brothers were amazed to learn of this upon their arrival, as they had not informed anyone of their plans. Baba then reaffirmed his foreknowledge by stating, "Look, these court-people have come, whom I said would come," providing them with a direct and sweet experience of his divine power and all-knowing nature.