´It was narrated that Suwaid bin Qais said:` "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."'
´It was narrated that Simak bin Harb said:` "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."'
´It was narrated that Ibn 'Umar said:` "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).
Hadith Referenceسنن نسائي / كتاب البيوع / 4598
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:ضعيف، إسناده ضعيف، تقدم (2521 ب) انوار الصحيفه، صفحه نمبر 355