عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ مَنِ ابْتَاعَ طَعَامًا زَادَ فِي رِوَايَةٍ بِكَيْلٍ أَوْ وَزْنٍ فَلَا يَبِعْهُ حَتَّى يَسْتَوْفِيَهُ
Narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: Whoever buys grain by measure or weight should not sell it until he has taken full possession of it.