[Machine] That the Messenger of Allah ﷺ sent a brother from the Ansar to lead them to Khaibar, so he brought dates in a bag. The Messenger of Allah ﷺ said to him, "Is it the case that the people of Khaibar eat such dates?" He said, "No, By Allah, O Messenger of Allah, we buy a Sa'a with two Sa'a from Al-Jam'." The Messenger of Allah ﷺ said, "Do not do that, but sell this and buy with its price from that." And that is how the scale works.
أَنَّ رَسُولَ اللهِ ﷺ بَعَثَ أَخَا بَنِي عَدِيٍّ الْأَنْصَارِيِّ فَاسْتَعْمَلَهُ عَلَى خَيْبَرَ فَقَدِمَ بِتَمْرٍ جَنِيبٍ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ أَكُلُّ تَمْرِ خَيْبَرَ هَكَذَا؟ قَالَ لَا وَاللهِ يَا رَسُولَ اللهِ إِنَّمَا نَشْتَرِي الصَّاعَ بِالصَّاعَيْنِ مِنَ الْجَمْعِ فَقَالَ رَسُولُ اللهِ ﷺ لَا تَفْعَلُوا وَلَكِنْ مِثْلًا بِمِثْلٍ أَوْ تَبِيعُوا هَذَا وَاشْتَرُوا بِثَمَنِهِ مِنْ هَذَا وَكَذَلِكَ الْمِيزَانُ