Sahih Muslim Book - 54, Hadith - 7534

وَحَدَّثَنَاهُ أَبُو كُرَيْبٍ حَدَّثَنَا أَبُو أُسَامَةَ حَدَّثَنَا هِشَامٌ عَنْ أَبِيهِ عَنْ عَائِشَةَ فِى قَوْلِهِ تَعَالَى (وَمَنْ كَانَ غَنِيًّا فَلْيَسْتَعْفِفْ وَمَنْ كَانَ فَقِيرًا فَلْيَأْكُلْ بِالْمَعْرُوفِ) قَالَتْ أُنْزِلَتْ فِى وَلِىِّ الْيَتِيمِ أَنْ يُصِيبَ مِنْ مَالِهِ إِذَا كَانَ مُحْتَاجًا بِقَدْرِ مَالِهِ بِالْمَعْرُوفِ.

It was narrated from 'Aishah concerning the Verse, "... And whoever (amongst guardians) is rich, he should take no wages, but if he is poor, let him have for himself what is just and reasonable..." that she said: "This was revealed concerning the guardian of an orphan's wealth; if he is in need he may take some of his wealth, on a reasonable basis, according to the orphan's share of the inheritance."