A man who buys food and finds it short

It is narrated from al-Hasan concerning a man who bought some kurrs of foodstuff from another man and paid the price, then went to have the food measured and it fell short. He said: "The owner of the food must refund the price of what remains, in proportion to what was bought."

He said: And Muhammad (Ibn Sirin) (may Allah have mercy on him) used to dislike it.