I've heard a story about Sai Baba lighting lamps with water. What happened and why did he do it?

The miracle of the lamps is a significant event detailed in Chapter 5. Sai Baba had a great love for lighting lamps, especially for the festival of lights, and would go to local grocers daily to beg for oil. After some time, the grocers grew tired of this and conspired to refuse him. When they all said "no," Baba returned to the mosque. He took his tin pot, which had a tiny bit of oil, poured water into it, and drank it as an offering. He then filled the lamps with plain water, soaked the wicks, and lit them. To the amazement of the grocers, the lamps burned brightly all night, serving as a powerful lesson about their deceit.