Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: When the Messenger of Allah (peace and blessings be upon him) came to Madinah, they were the worst of people in measuring, so Allah, the Mighty and Majestic, revealed this verse: "Woe to those who give short measure." [Surah al-Mutaffifin: 1] After that they made their measuring right.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11989