Sahih al-Bukhari 2429

Abd Allah ibn Yusuf informed us: Malik informed us, from Rabi'a ibn Abi Abd al-Rahman, from Yazid, the client of al-Munba'ith, from Zayd ibn Khalid (may Allah be pleased with him): A man came to the Messenger of Allah (peace and blessings be upon him) and asked him about found property. He said: ‘Identify its container and tie, then announce it for a year. If its owner comes, return it; otherwise, you may decide what to do with it.’ The man asked, ‘What about a lost sheep?’ He said: ‘It is yours, your brother’s, or the wolf’s.’ He asked, ‘What about a lost camel?’ He said: ‘What business have you with it? It has its water reserve and its shoes; it reaches water and eats trees until its owner finds it.’