Sahih al-Bukhari
Sahih al-Bukhari 2198
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ حُمَيْدٍ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ بَيْعِ الثِّمَارِ حَتَّى تُزْهِيَ. فَقِيلَ لَهُ وَمَا تُزْهِي قَالَ حَتَّى تَحْمَرَّ. فَقَالَ " أَرَأَيْتَ إِذَا مَنَعَ اللَّهُ الثَّمَرَةَ، بِمَ يَأْخُذُ أَحَدُكُمْ مَالَ أَخِيهِ " .
Abdullah ibn Yusuf informed us: Malik informed us, from Humayd, from Anas ibn Malik, may Allah be pleased with him, that the Messenger of Allah forbade selling produce until it began to ripen. He was asked, “What does that mean?” He replied, “Until it turns red.” He then said, “If Allah were to withhold the fruit, on what basis would one of you take his brother wealth?”
Translation notes
The closing rhetorical question grounds the sale prohibition in the risk that the crop may fail before the buyer receives it.