(13) باب النَّهْىِ عَنْ بَيْعِ الثِّمَارِ، قَبْلَ بُدُوِّ صَلاَحِهَا بِغَيْرِ شَرْطِ الْقَطْعِ
Ibn Umar (Allah be pleased with them) reported Allah's Messenger (ﷺ) 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.
Reference: Sahih Muslim 1534 c
In-book reference: Book 21, Hadith 64
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3667