‏البيوع : Hadeeth No:3667 Ibn Umar (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Do not buy fruit until its good condition becomes clear, and (the danger) of blight is no more. He said: Its good condition becoming clear implies that it becomes red or yellow....

‏اللباس والزينة‏ : Hadeeth No:5160 This hadith has been narrated on the authority of Mubammad b. Ja'far but with a slight variation of wording....