A man who buys food and it exceeds the amount: who gets the excess?

It is narrated from al-Hasan that the Prophet (peace and blessings be upon him) forbade selling food until the two sa's have been applied to it. Then both the excess and the shortfall will belong to the buyer.

It is narrated from Ubaydah that it was forbidden to sell food to which the two sa's have not been applied. The excess goes to the buyer and the loss falls on the seller.

Ibn Sirin and al-Hasan were asked: A man has bought food; may he sell it on the strength of its earlier measure? They said: No, not until the two sa's have been applied to it. Then both the excess and the shortfall will belong to the buyer.

It is narrated from al-Sha'bi and al-Hakim about a person who buys food and it then turns out to be more than agreed. They said: If a mistake was made, he is to return it, and if it is in excess, he is to return it.

Muwarriq al-Ijli said: We sent a ship from Ahwaz to Basra carrying thirty kurr of goods, and those goods were nothing but what was left over between two measurings (that is, what remains or falls when measuring from one measure to another).

Ata said: If you sell food and it then turns out to be more or less than the amount, the responsibility for it is yours.