"Makhrafah Al-Abdi and I brought some cloth from Hajar, and the Messenger of Allah came to us while we were in Mina where there w a man who weighed (goods) in return for payment. He bought some trousers from us, and said to the man who weighed: 'Weigh it, and allow more."'  

جَلَبْتُ أَنَا وَمَخْرَفَةُ الْعَبْدِيُّ بَزًّا مِنْ هَجَرَ فَأَتَانَا رَسُولُ اللَّهِ ﷺ وَنَحْنُ بِمِنًى وَوَزَّانٌ يَزِنُ بِالأَجْرِ فَاشْتَرَى مِنَّا سَرَاوِيلَ فَقَالَ لِلْوَزَّانِ زِنْ وَأَرْجِحْ  

"I heard Abu Safwan say: 'I bought a pair of trousers from the Messenger of Allah before the Hijrah, and he weighed it for me and allowed me."'  

بِعْتُ مِنْ رَسُولِ اللَّهِ ﷺ سَرَاوِيلَ قَبْلَ الْهِجْرَةِ فَأَرْجَحَ لِي  

"The Messenger of Allah said: "Volume is to be measured according to the system of the people of Al-Madinah, and weight is to be measured according to the system of the peole of Makkah."' (Sahih) This is the wording of Ishaq (one of the narrators).  

قَالَ رَسُولُ اللَّهِ ﷺ الْمِكْيَالُ عَلَى مِكْيَالِ أَهْلِ الْمَدِينَةِ وَالْوَزْنُ عَلَى وَزْنِ أَهْلِ مَكَّةَ وَاللَّفْظُ لإِسْحَاقَ