Sahih al-Bukhari 4575
Narrated Aisha:
regarding the Statement of Allah: "And whoever amongst the guardian is rich, he should take no 
wages, but if he is poor, let him have for himself what is just and reasonable (according to his work). 
This Verse was revealed regarding the orphan's property. If the guardian is poor, he can take from the 
property of the orphan, what is just and reasonable according to his work and the time he spends on 
managing it.
حَدَّثَنِي إِسْحَاقُ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، حَدَّثَنَا هِشَامٌ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ فِي قَوْلِهِ تَعَالَى ‏{‏وَمَنْ كَانَ غَنِيًّا فَلْيَسْتَعْفِفْ وَمَنْ كَانَ فَقِيرًا فَلْيَأْكُلْ بِالْمَعْرُوفِ‏}‏ أَنَّهَا نَزَلَتْ فِي مَالِ الْيَتِيمِ إِذَا كَانَ فَقِيرًا، أَنَّهُ يَأْكُلُ مِنْهُ مَكَانَ قِيَامِهِ عَلَيْهِ، بِمَعْرُوفٍ‏.‏