Which miraculous event involving fire is described during Sai Baba's time with Chandbhai before coming to Shirdi?

The Introduction (Chapter 0) recounts a specific miracle involving fire that occurred before Maharaj came to Shirdi. When Maharaj first met Chandbhai in the forest, he offered him a smoke from a chillum. However, there was no fire available in the forest to light it. To solve this, Maharaj struck his tongs on the ground, which miraculously produced a fire, allowing him to complete the task. This event, which happened after he helped Chandbhai find his lost horse, further convinced Chandbhai of his special nature.