2-43 Muhammad ibn Musa ibn al-Mutevakil - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Muhammad ibn Ahmad who linked it up through a chain of narrators to Al-Hussein ibn Zayd ibn Ali ibn Abi Talib, on the authority of his father Zayd ibn Ali, on the authority of his father Ali ibn al-Hussein (MGB), on the authority of his father Al-Hussein (MGB), on the authority of his father Ali (MGB) that God’s Prophet (MGB) said, “The business of any two businessmen who are sincere in dealing with each other will be blessed for as long as they remainhonest with each other. Once one cheats the other, their business will no longer be blessed. The two parties to a deal can call off the deal for as long as they are both present. If there is a dispute between them, what the owner says is more acceptable.”