حَدَّثَنَا إِبْرَاهِيمُ بْنُ مُحَمَّدِ بْنِ يُوسُفَ الْفِرْيَابِيُّ، حَدَّثَنَا وَسَّاجُ بْنُ عُقْبَةَ بْنِ وَسَّاجٍ، حَدَّثَنَا الْوَلِيدُ بْنُ مُحَمَّدٍ الْمُوَقَّرِيُّ، حَدَّثَنَا الزُّهْرِيُّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ دَخَلَ النَّبِيُّ ـ صلى الله عليه وسلم ـ الْبَيْتَ فَرَأَى كِسْرَةً مُلْقَاةً فَأَخَذَهَا فَمَسَحَهَا ثُمَّ أَكَلَهَا وَقَالَ ‏"‏ يَا عَائِشَةُ أَكْرِمِي كَرِيمَكِ فَإِنَّهَا مَا نَفَرَتْ عَنْ قَوْمٍ قَطُّ فَعَادَتْ إِلَيْهِمْ ‏"‏ ‏.‏

It wasnarrated that ‘Aishah said: “The Messenger of Allah (PBUH)enteredthe house and saw a piece of bread that had been thrown (onthefloor). He picked it up, wiped it and ate it, and said: ‘O‘Aishah,show honor to the precious (i.e., food), for is the blessingof fooddeparts from people, it never comes back.’” Translation Not Available

Book Ref: Sunan Ibn Majah Book 29 Hadith 3353
Web Ref:  Sunan Ibn Majah Vol 4 Book 29 Hadith 3353