Sahl b. Abu Hathma reported Allah's Messenger (ﷺ) having forbidden Muzabana, i. e. exchange of fresh dates with dry dates. except in case of those to whom donations of some trees have been made. It is for them that concession has been given.
Reference: Sahih Muslim 1540 e In-book : Book 21, Hadith 90 USC-MSA web (English) : Book 10, Hadith 3691 (deprecated)
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