The Book of Financial Transactions
44/55. Chapter:
Selling food before taking possession of it
Sunan an-Nasai
أَخْبَرَنَا أَحْمَدُ بْنُ حَرْبٍ، قَالَ حَدَّثَنَا قَاسِمٌ، عَنْ سُفْيَانَ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنِ ابْتَاعَ طَعَامًا فَلاَ يَبِيعُهُ حَتَّى يَكْتَالَهُ " .
It was narrated that Ibn 'Abbas said: "The Messenger of Allah said: 'Whoever buys food, let him not sell it until he has checked its weight.""
Reference : Sunan an-Nasa'i 4597In-book reference : Book 44, Hadith 149English translation : Vol. 5, Book 44, Hadith 4601