Mishkat al-Masabih
He reported God's Messenger as saying, “If anyone buys grain he must not sell it till he has received it in full.” A version by Ibn ‘Abbas has, ‘‘till he measures it out.” (Bukhari and Muslim.)
وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنِ ابْتَاعَ طَعَامًا فَلَا يَبِيعهُ حَتَّى يَسْتَوْفِيه» وَفَى رِوَايَةِ ابْنِ عَبَّاسٍ: «حَتَّى يكْتالَه»
Reference