وَعَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ; عَبْدِ اَللَّهِ بْنِ عَمْرِوٍ;
أَنَّ رَسُولَ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مِنْ وَلِيَ يَتِيمًا لَهُ مَالٌ، فَلْيَتَّجِرْ لَهُ، وَلَا يَتْرُكْهُ حَتَّى تَأْكُلَهُ اَلصَّدَقَةُ»
“One who becomes the guardian of an orphan, who owns property, must trade on his behalf and not leave it (saved and unused) until it is all eaten up by Zakah (which is paid yearly).” Related by At-Tirmidhi and Ad-Daraqutni with a weak chain of narrators.
Bulugh al-Maram 717, Book 4, The Book of Zakah, Hadith 11. 1 min read