It is narrated from Hazrat Umrah bint Abdur Rahman that in the time of the Messenger of Allah, peace and blessings be upon him, a man bought the fruits of a garden and was engaged in their care, but a calamity struck which caused damage. He said to the owner of the garden: Either reduce the price of the fruits or cancel this sale. The owner swore an oath that he would never do so. Then the buyer’s mother came to the Messenger of Allah, peace and blessings be upon him, and related the whole story. The Prophet, peace and blessings be upon him, said:“Has he sworn an oath that he will not do this good deed?”When the owner of the garden heard this, he came to the Messenger of Allah, peace and blessings be upon him, and said: O Messenger of Allah, peace and blessings be upon him! Whatever the buyer says, I accept.

Umar ibn Abd al-Aziz ordered that the buyer should bear the loss when a crop or fruit is afflicted by a calamity.

Imam Malik, may Allah have mercy on him, said: In our view, this is the ruling. However, it is necessary that the loss from this calamity amounts to one third of the wealth or more; if the loss is less than this, it is not considered.