Musnad Ahmad 33:767

Bahz narrated to me, Sulaym ibn Hayyan narrated to us, Sa'id ibn Mina narrated to us, from Jabir ibn Abdullah, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) forbade the selling of fruit until it *tashaqqah*." I said to Sa'id: "What is *tashaqqah*?" He said: "It turns red and yellow, and it can be eaten from."