حَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَالَ ‏"‏ مَنِ ابْتَاعَ طَعَامًا فَلاَ يَبِعْهُ حَتَّى يَسْتَوْفِيَهُ ‏"‏ ‏.‏

It was narrated from Ibn 'Umar that the Prophet (PBUH) said: "Whoever buys food, let him not sell it until he has taken full possession of it." Translation Not Available

Book Ref: Sunan Ibn Majah Book 12 Hadith 2226
Web Ref:  Sunan Ibn Majah Vol 3 Book 12 Hadith 2226