"Makhrafah Al' Abdi and I brought linens from Hajar[1] The Messenger of Allah ﷺ came to us to bargain with us with some trousers. There was someone with me who weighed (the goods) in exchange for a wage. So the Prophet ﷺ said to the one weighing: 'Weigh and add more.'" (Using translation from Ibn Mājah 2220)   

جَلَبْتُ أَنَا وَمَخْرَمَةُ الْعَبْدِيُّ ثِيَابًامِنْ هَجَرَ قَالَ فَأَتَانَا رَسُولُ اللهِ ﷺ فَسَاوَمَنَا فِي سَرَاوِيلَ وَعِنْدَنَا وَزَّانُونَ يَزِنُونَ بِالْأَجْرِ فَقَالَ لِلْوَزَّانِ زِنْ وَأَرْجِحْ  

"I heard Malik Abu Safwan bin 'Umairah, say: 'I bought a pair of trousers from the Messenger of Allah ﷺ before the Hijrah, and he weighed it for me and allowed more."' (Using translation from Ibn Mājah 2221)   

بِعْتُ رَسُولَ اللهِ ﷺ رِجْلَ سَرَاوِيلَ قَبْلَ الْهِجْرَةِ فَأَرْجَحَ لِي