It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that when the Messenger of Allah (peace and blessings be upon him) came to Madinah, its people were among the worst in measuring and weighing. Then Allah Almighty revealed this verse: "Woe to those who give short measure" [Surah al-Mutaffifin: 1] . After that they greatly improved their measuring and weighing. This hadith is sahih (authentic), but the two Shaykhs (Bukhari and Muslim) did not record it. It also has a detailed supporting report (shahid) narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him).