What was the specific vow Cholkar made to Sai Baba and what was his reason for making it?

Cholkar, who came from a poor household, made a specific vow to Sai Baba because his ability to earn a living depended on passing an examination to make his job permanent. As detailed in Chapter 15, he was concerned that without passing, even his daily bread would be at stake. His vow was a firm resolve: if he passed the exam by Baba's grace, he would travel to Shirdi for darshan and distribute sugar candy (khadisakhar) in Baba's name. After his wish was granted, he eventually made the journey and fulfilled his promise by distributing sugar and offering a coconut at Baba's feet.