there was a man at the time of the Messenger of Allah ﷺ whose mental faculties were lacking, and he used to buy and sell. His family came to the Prophet ﷺ and said, “O Messenger of Allah, stop him.” So The Prophet ﷺ called him, and told him not to do that. He said: “O Messenger of Allah ﷺ, I cannot bear to be away from business.” He said, “If you engage in a transaction then say: “Take it (i.e., the goods) and don't cheat (me).' ”
أَنَّ رَجُلاً كَانَ فِي عَهْدِ رَسُولِ اللَّهِ ﷺ فِي عُقْدَتِهِ ضَعْفٌ وَكَانَ يُبَايِعُ وَأَنَّ أَهْلَهُ أَتَوُا النَّبِيَّ ﷺ فَقَالُوا يَا رَسُولَ اللَّهِ احْجُرْ عَلَيْهِ فَدَعَاهُ النَّبِيُّ ﷺ فَنَهَاهُ عَنْ ذَلِكَ فَقَالَ يَا رَسُولَ اللَّهِ إِنِّي لاَ أَصْبِرُ عَنِ الْبَيْعِ فَقَالَ إِذَا بَايَعْتَ فَقُلْ هَا وَلاَ خِلاَبَةَ