اَخْبَرَنَا وَکِیْعٌ، نَا سُفْیَانُ، عَنِ ابْنِ طَاؤُوْسٍ، عَنْ اَبِیْهِ، عَنِ ابْنِ عَبَّاسٍ، عَنْ رَسُوْلِ اللّٰهِ صَلَّی اللّٰهُ عَلَیْهِ وَسَلَّمَ قَالَ: مَنِ ابْتَاعِ طَعَامًا، فَلَا یَبِعْهٗ حَتَّی یَکْتَالَهٗ۔ قُلْتُ لِابْنِ عَبَّاسٍ: لِمَ؟ قَالَ: اَ لَا تَرَاهُمْ یُبَایِعُوْنَ بِالذَّهَبِ وَالطَّعَامُ مُرْجًا؟.
Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated from the Messenger of Allah (peace and blessings be upon him), he (peace be upon him) said: "Whoever buys grain should not sell it until he measures it." I said to Sayyiduna Ibn Abbas (may Allah be pleased with them both): Why? He said: Do you not see that they used to sell it for gold coins while there was only hope of the grain arriving?