What was Sai Baba's response and instruction when the parents of the suffering child pleaded with him?

When the worried parents reached Shirdi, they immediately sought Sai Baba's darshan and prostrated at his feet. Chapter 34 describes them pleading with choked voices and pitiful faces, explaining their son's suffering and their own exhaustion. In response, Sai, who is called the embodiment of compassion, reassured them completely. He told them to be worry-free and gave them Udi. His specific instruction was to take the Udi and smear it on the boy's wound. He also gave them a powerful assurance, stating that those who seek shelter in the Masjid shall never face downfall.