It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) found a dinar and brought it to Sayyidah Fatimah (may Allah be pleased with her). She said: This is provision that Allah Almighty has given us; all praise belongs to Allah Almighty. Buy meat and food with it. Sayyiduna Ali (may Allah be pleased with him) bought the food, then he said to Sayyidah Fatimah (may Allah be pleased with her): Inform your father (Muhammad (peace and blessings be upon him)) of it; if he considers it lawful, we will eat it. When they had prepared the food, they invited the Messenger of Allah (peace and blessings be upon him). When he (peace and blessings be upon him) came, they mentioned it to him, and the Messenger of Allah (peace and blessings be upon him) said: "It is the provision of Allah." He (peace and blessings be upon him) ate of it and they ate too. After that a woman came who had lost a dinar, and he (peace and blessings be upon him) said: "O Ali! Give her the dinar."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللقطة / 12093