Sunan Ibn Majah, Book 12, Hadith 2311 (In-Book) ⓘ
It was narrated from Ibn 'Umar that the Prophet said: "Whoever buys food, let him not sell it until he has taken full possession of it."
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 " .
also referenced under: Hadith 2226 (Reference) & Volume 3, Book 12, Hadith 2226 (DarusSalam)