[Machine] He heard Uthman ibn Affan saying on the pulpit, "I used to buy dates as a measure, then I bring them to Medina, carrying them myself along with my servant. This would be from a place near Medina, in the market of Qainqaa. I would make a profit of a sa' and two sa's. Then, I would measure my profit and distribute the remaining dates among them." The Messenger of Allah ﷺ was informed of this. Then, he asked Uthman, "Did you weigh the dates, O Uthman?" Uthman replied, "Yes, O Messenger of Allah." The Messenger of Allah ﷺ said, "When you buy, measure, and when you sell, weigh."  

أَنَّهُ سَمِعَ عُثْمَانَ بْنَ عَفَّانَ ؓ يَقُولُ عَلَى الْمِنْبَرِ إِنِّي كُنْتُ أَشْتَرِي التَّمْرَ كَيْلًا فَأَقْدَمُ بِهِ إِلَى الْمَدِينَةِ أَحْمِلُهُ أَنَا وَغِلْمَانٌ وَذَلِكَ مِنْ مَكَانٍ قَرِيبٍ مِنَ الْمَدِينَةِ بِسُوقِ قَيْنُقَاعَ فَأَرْبَحُ الصَّاعَ وَالصَّاعَيْنِ فَأَكْتَالُ رِبْحِي ثُمَّ أُصُبُّ لَهُمْ مَا بَقِيَ مِنَ التَّمْرِ فَحُدِّثَ بِذَلِكَ رَسُولُ اللهِ ﷺ ثُمَّ إِنَّهُ سَأَلَ عُثْمَانَ ؓ قَالَ نَعَمْ يَا رَسُولَ اللهِ فَقَالَ رَسُولُ اللهِ ﷺ إِذَا اشْتَرَيْتَ يَا عُثْمَانُ فَاكْتَلْ وَإِذَا بِعْتَ فَكِلْ