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 : Book 21, Hadith 63 USC-MSA web (English) : Book 10, Hadith 3666 (deprecated)
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