Fadila b. 'Ubaid (Allah be pleased with him) reported:
I bought on the day (of the Victory of Khaibar) a necklace for twelve dinars (gold coins). It was made of gold studded with gems. I separated (gold from gems) in it, and found (gold) of more (worth) than twelve dinars. I made a mention of it to Allah's Apostle (ﷺ), whereupon he said: It should not be sold unless it is separated.
Reference: Sahih Muslim 1591 b In-book : Book 22, Hadith 115 USC-MSA web (English) : Book 10, Hadith 3864 (deprecated)
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