Narrated Abdullah ibn Mas'ud: Muhammad ibn al-Ash'ath said: Al-Ash'ath bought slaves of booty from Abdullah ibn Mas'ud for twenty thousand (Dirhams. Abdullah asked him for payment of their price. He said: I bought them for ten thousand (Dirhams). Abdullah said: Appoint a man who may adjudicate between me and you. Al-Ash'ath said: (I appoint) you between me and yourself. Abdullah said: I heard the Messenger of Allah ﷺ say: If both parties in a business transaction differ (on the price of an article), and they have witness between them, the statement of the owner of the article will be accepted (as correct) or they may annul the transaction.
The Prophet Muhammad also taught us that we should not take advantage of others or try to manipulate them into giving us more than what we deserve. We must always be honest and just when dealing with others so that everyone involved can benefit from the transaction without feeling cheated or taken advantage of.
