‘Amr b. Shu'aib on his father’s authority said that his grandfather told of the Prophet (ﷺ) addressing the people and saying, “If anyone is guardian of an orphan who owns property, he must trade with it and not leave it till the sadaqa consumes it." Tirmidhi transmitted it, adding that its <i>isnad</i> has been criticised because al-Muthanna b. as- Sabbah was weak.

وَعَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَطَبَ النَّاسَ فَقَالَ: «أَلَا مَنْ وَلِيَ يَتِيمًا لَهُ مَالٌ فَلْيَتَّجِرْ فِيهِ وَلَا يَتْرُكْهُ حَتَّى تَأْكُلَهُ الصَّدَقَةُ» . رَوَاهُ التِّرْمِذِيُّ وَقَالَ: فِي إِسْنَادِهِ مقَال: لِأَن الْمثنى بن الصَّباح ضَعِيف