They may cover up [food] with hides, and they may be handled; [They may cover up food] with wool shearings, but they may not be handled. What then is done? The lid [of the pot] is lifted, and they [the shearings] fall off of their own accord. Rabbi Elazar ben Azariah says: the basket [holding the pot] he turns on its side and [the food] is removed, lest one lift [the lid of the pot] and is unable to replace it. But the Sages say: one may take [out the pot] and replace [it]. If he did not cover it [a pot] while it was yet day, it may not be covered after nightfall. If it was covered but became uncovered, it may be recovered. One may fill a jug with [cold water] and place it under a pillow or blanket [to keep it cool].