It was narrated that 'Aishah said: "The Messenger of Allah P.B.U.H entered the house and saw a piece of bread that had been thrown (on the floor). He picked it up, wiped it and ate it, and said: '0 'Aishah, show honor to the precious (i.e., food), for if the blessing of food departs from people, it never comes back.": (Da'if)