How does the story of Damu Anna serve as an example of Sai's mercy?

The narrative of Damu Anna is presented in Chapter 25 as a specific report to demonstrate Sai's love and mercy. The author prefaces the story by stating that once a devotee establishes 'one-pointed faith,' Sai wards off all their misfortunes, removes their suffering, and grants their desired objects. Damu Anna's situation—being a wealthy man who lacked children despite having two wives—represented a significant form of suffering for him. His story, in which he is blessed with sons after receiving Sai's grace, serves as a direct illustration of this principle. The author emphasizes this by calling the Guru-Mother an 'Ocean of Mercy' right before recounting this tale.