It was narrated from 'Amr bin Shu'aib from his father, that his a grandfather said:

“A man came to the Prophet (ﷺ) and said: 'I do not have anything and I have no wealth, but I have an orphan (under my care) who has wealth.” He said: “Eat from the wealth of your orphan, without being extravagant or use it for trade.” He (narrator) said: “And I think he said: 'Do not preserve your wealth using his instead.'”

حَدَّثَنَا أَحْمَدُ بْنُ الأَزْهَرِ، حَدَّثَنَا رَوْحُ بْنُ عُبَادَةَ، حَدَّثَنَا حُسَيْنٌ الْمُعَلِّمُ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ جَاءَ رَجُلٌ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ لاَ أَجِدُ شَيْئًا وَلَيْسَ لِي مَالٌ وَلِي يَتِيمٌ لَهُ مَالٌ قَالَ ‏"‏ كُلْ مِنْ مَالِ يَتِيمِكَ غَيْرَ مُسْرِفٍ وَلاَ مُتَأَثِّلٍ مَالاً ‏"‏ ‏.‏ قَالَ وَأَحْسِبُهُ قَالَ ‏"‏ وَلاَ تَقِي مَالَكَ بِمَالِهِ ‏"‏ ‏.‏