What is the story behind the wooden plank that Sai Baba used for sleeping in the Masjid?

The story of the plank originates from the kindness of a devotee named Nanasaheb Dengle. According to chapter 0, the Masjid where Maharaj lived was dilapidated and dusty. Concerned that Maharaj was sleeping on the bare ground, Nanasaheb brought a thick wooden plank for him to sleep on. In a display of his unique power, Maharaj did not place the plank on the ground. Instead, he hung it from the rafters of the Masjid using old rags and began sleeping on it, much to the astonishment of everyone who witnessed it.