Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: When the Prophet (peace and blessings be upon him) came to Madinah, the people were among the worst in their measuring, so Allah Almighty revealed this verse: "Woe to those who give short measure" [Surah al-Mutaffifin: 1]. After that the people reformed themselves.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11165
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrated that the Messenger of Allah (peace and blessings be upon him) said: "O company of traders, you have been placed in charge of a matter in which earlier nations were destroyed, namely measure and weight."
Abu Ali Hanash narrated it as marfu' (attributed to the Prophet), while others narrated it through another route as mawquf (the saying of Ibn Abbas).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11166
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: "O company of non-Arabs, Allah Almighty has entrusted you with two matters over which the nations before you were destroyed, namely measure and weight."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11167
Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrated that the Messenger of Allah (peace and blessings be upon him) bought a camel from me. He gave me extra dirhams, and those dirhams remained with me until the event of al-Harrah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11168