How did Sai Baba respond when the parents from Malegaon pleaded for their son's healing in Chapter 34?

In Chapter 34, when the parents of the ailing child arrived in Shirdi and narrated their son's suffering, they pleaded with pitiful faces for Sai's help. They expressed their exhaustion and desperation, asking Sai Samarth to place his protective hand on their son. In response, Sai, described as the embodiment of compassion, reassured them completely. He told them to become worry-free. He then gave them his sacred Udi with the specific instruction to 'smear it on that wound.' Furthermore, as mentioned in Chapter 34, he offered them a profound promise, stating that those who seek shelter in the Masjid shall never face downfall, providing them with both a tangible remedy and immense spiritual comfort.