Hadith 1535
Chapter 13: The prohibition of selling produce before its goodness appears - كتاب البيوع
وَحَدَّثَنِي عَلِيُّ بْنُ حُجْرٍ السَّعْدِيُّ، وَزُهَيْرُ بْنُ حَرْبٍ، قَالاَ حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ بَيْعِ النَّخْلِ حَتَّى يَزْهُوَ وَعَنِ السُّنْبُلِ حَتَّى يَبْيَضَّ وَيَأْمَنَ الْعَاهَةَ نَهَى الْبَائِعَ وَالْمُشْتَرِيَ .
Ibn 'Umar (Allah be pleased with them) reported that Allah's Messenger (ﷺ) forbade the sale of palm-trees (i. e. their trults) until the dates began to ripen, and ears of corn until they were white and were safe from blight. He forbade the seller and the buyer.
Reference : Sahih Muslim 1535
In-book reference : Book 21, Hadith 63
USC-MSA web (English) reference : Book 10, Hadith 3666