It was narrated from' Amr bin Shu' aib, from his father, that his grandfather said: "A man came to the Prophet and said: 'I do not have anything and have no wealth, but have an orphan (under my care) who has wealth." He said: "Eat from the wealth of your orphan, without being extravagant or use it for trade." He (the narrator) said: "And think he said: 'Do not preserve your wealth using his instead:’"