Who is presented as the main example to prove Sai's loving treatment of his devotees?

Balasaheb Deo is presented as the primary example, or "wager," to demonstrate Sai's loving treatment of devotees. Chapter 41 begins with the general principle that Sai is affectionate towards those with spiritual tastes and helps them overcome difficulties. The narrative then immediately pivots to Deo's story to illustrate this point, stating, "The sweet experience of this meaning is the wager of Balasaheb Deo. He fulfilled his wish and gave him the addition of devotion." Deo's struggle and his ultimate reliance on Sai serve as the key narrative demonstrating this aspect of Baba's character.