(95) بَابُ مَنْ أَجْرَى أَمْرَ الأَمْصَارِ عَلَى مَا يَتَعَارَفُونَ بَيْنَهُمْ فِي الْبُيُوعِ وَالإِجَارَةِ وَالْمِكْيَالِ، وَالْوَزْنِ، وَسُنَنِهِمْ عَلَى نِيَّاتِهِمْ وَمَذَاهِبِهِمِ الْمَشْهُورَةِ
Narrated Hisham bin `Urwa from his father:
who heard Aisha saying, "The Holy Verse; 'Whoever amongst the guardians is rich, he should take no wages (from the property of the orphans) but If he is poor, let him have for himself what is just and reasonable (according to his labors)' (4.6) was revealed concerning the guardian of the orphans who looks after them and manages favorably their financial affairs; If the guardian Is poor, he could have from It what Is just and reasonable, (according to his labors).
Reference: Sahih al-Bukhari 2212
In-book reference: Book 34, Hadith 158
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 34, Hadith 414