"When the Prophet ﷺ came to Al-Madinah, they were the worst people in weights and measures. Then Allah, Glorious is He revealed: "Woe to the Mutaffifun (those who give less in measure and weight)",[1] and they were fair in weights and measures after that. (Using translation from Ibn Mājah 2223)   

لَمَّا قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ كَانُوا مِنْ أَخْبَثِ النَّاسِ كَيْلًا فَأَنْزَلَ اللهُ ﷻ {وَيْلٌ لِلْمُطَفِّفِينَ} [المطففين 1] فَأَحْسَنُوا الْكَيْلَ بَعْدَ ذَلِكَ  

[Machine] The Messenger of Allah ﷺ said: "O merchants, you have been entrusted with a matter in which previous nations have perished - the measure and the balance. This was established by Abu Ali Hanash, and others have narrated it from another aspect by Ibn Abbas."  

قَالَ رَسُولُ اللهِ ﷺ يَا مَعْشَرَ التُّجَّارِ إِنَّكُمْ قَدْ وُلِّيتُمْ أَمْرًا هَلَكَتْ فِيهِ الْأُمَمُ السَّالِفَةُ الْمِكْيَالَ وَالْمِيزَانَ أَسْنَدَهُ أَبُو عَلِيٍّ حَنَشٌ وَوَقَفَهُ غَيْرُهُ مِنْ وَجْهٍ آخَرَ عَنِ ابْنِ عَبَّاسٍ  

[Machine] Ibn Abbas said, "O people of the non-Arabs, indeed Allah has entrusted you with two matters by which previous generations before you were destroyed: the measure and the balance."  

ابْنُ عَبَّاسٍ يَا مَعْشَرَ الْأَعَاجِمِ إِنَّ اللهَ قَدْ وَلَّاكُمْ أَمْرَيْنِ أُهْلِكَ بِهِمَا الْقُرُونُ مِنْ قَبْلِكُمُ الْمِكْيَالَ وَالْمِيزَانَ