Sahih Muslim Book - 54, Hadith - 7533

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ عَنْ هِشَامٍ عَنْ أَبِيهِ عَنْ عَائِشَةَ فِى قَوْلِهِ ( وَمَنْ كَانَ فَقِيرًا فَلْيَأْكُلْ بِالْمَعْرُوفِ) قَالَتْ أُنْزِلَتْ فِى وَالِى مَالِ الْيَتِيمِ الَّذِى يَقُومُ عَلَيْهِ وَيُصْلِحُهُ إِذَا كَانَ مُحْتَاجًا أَنْ يَأْكُلَ مِنْهُ.

It was narrated from 'Aishah concerning the Verse, "...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, who looks after it; if he is in need he may eat from it."