Sahih Ibn Hibban 5049

Translation

✧ A man during the time of the Messenger of Allah ﷺ used to engage in trade, and there was weakness in his mental capacity. His family came to the Prophet of Allah ﷺ and said, 'O Prophet of Allah, place a restriction on so-and-so, for he engages in trade while there is weakness in his mental capacity.' The Prophet of Allah ﷺ called him and forbade him from selling. He said, 'O Prophet of Allah, I cannot be patient away from selling.' The Prophet of Allah said, 'If you will not abandon selling, then say, "No cheating, no cheating."'

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