Yahya related to me from Malik from Abu'r-Rijal Muhammad ibn Abd ar-Rahman ibn Haritha from his mother, Amra bint Abd ar-Rahman that the Messenger of Allah, may Allah bless him and grant him peace, forbade selling fruit until it was clear of blight. Malik said, "Selling fruit before it has begun to ripen is an uncertain transaction (gharar) ."
Muwatta Malik Book 31, Hadith 12
← Previous Hadith Yahya related to me from Malik from Humayd at-Tawil from Anas ibn Malik that the Messenger of Allah, may Allah bless him and grant him peace, forbade selling fruit until it had become mellow. He was asked, "Messenger ofAllah! What do you mean by become mellow?" He said, "When it becomes rosy."

The Messenger of Allah, may Allah bless him and grant him peace, added, "Allah may prevent the fruit from maturing, so how can you take payment from your brother for it."

Muwatta Malik Book 31, Hadith 11 Next Hadith → Yahya related to me from Malik from Abu'z-Zinad from Kharija ibn Zayd ibn Thabit that Zayd ibn Thabit did not sell fruit until the Pleiades were visible, at the end of May.

Malik said, "The way of doing things among us about selling melons, cucumbers, water- melons, and carrots is that it is halal to sell them when it is clear that they have begun to ripen. Then the buyer has what grows until the season is over. There is no specific timing laid down for that because the time is well known with people, and it may happen that the crop will be affected by blight and put a premature end to the season. If blight strikes and a third or more of the crop is damaged, an allowance for that is deducted from the price of purchase."

Muwatta Malik Book 31, Hadith 13