He who buys food-rain should not sell it until he has taken possession of it. Ibn Abbas (Allah be pleased with them) said: I regard everything like food (so far as this principle is concerned).
قَالَ رَسُولُ اللَّهِ ﷺ مَنِ ابْتَاعَ طَعَامًا فَلاَ يَبِعْهُ حَتَّى يَقْبِضَهُ قَالَ ابْنُ عَبَّاسٍ وَأَحْسِبُ كُلَّ شَىْءٍ بِمَنْزِلَةِ الطَّعَامِ