Sahih Muslim
The Book of Transactions (Kitab Al-Buyu)
Book Number: 010 / Hadith Number: 3711
Jabir b. Abdullah (Allah be pleased with them) reported Allah's Messenger (may peace be upon him) forbidding Muzabana and Muhaqala, and Mukhabara, and the sale of fruits until they are ripe. I (the narrator) said to Sa'id (the other narrator): What does ripening imply? He said: It meant that they become red or become yellow and are fit for eating.