Sayyidah Aishah (may Allah be pleased with her) said concerning the saying of Allah Almighty, "And whoever is rich should abstain, and whoever is poor may consume what is reasonable" [Surah al-Nisa: 6], that this verse was revealed concerning the guardian of an orphan: when he is poor, he may eat from his wealth in a reasonable manner.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوصايا / 12668