Sahih al-Bukhari 2196

Musaddad narrated to us: Yahya ibn Said narrated to us, from Salim ibn Hayyan: Said ibn Mina narrated to us; he said: I heard Jabir ibn Abdullah, may Allah be pleased with them both, say: The Prophet forbade selling fruit until it had begun to change color. He was asked, “What does that mean?” He replied, “It turns red and yellow, and some of it can be eaten.”