It was narrated from Ibn 'Umar that the Prophet (ﷺ) said:"The measure (to be used) is the measure of the people of Al-Madinah, and the weight (to be used) is the weight of the people of Makkah."
أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ حَنْظَلَةَ، عَنْ طَاوُسٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْمِكْيَالُ مِكْيَالُ أَهْلِ الْمَدِينَةِ وَالْوَزْنُ وَزْنُ أَهْلِ مَكَّةَ " .
Nesai
The Book of Zakah • Hadith 2520