Sahih al-Bukhari 2427

Amr ibn Abbas narrated to us: Abd al-Rahman narrated to us: Sufyan narrated to us, from Rabi'a, who said: Yazid, the client of al-Munba'ith, told me, from Zayd ibn Khalid al-Juhani (may Allah be pleased with him): A Bedouin came to the Prophet (peace and blessings be upon him) and asked him about something found. He said: ‘Announce it for a year, then remember its container and tie. If someone comes and describes it to you, [return it to him]; otherwise, spend it.’ The man asked, ‘Messenger of Allah, what about a lost sheep?’ He said: ‘It is yours, your brother’s, or the wolf’s.’ He asked, ‘What about a lost camel?’ The Prophet’s face changed, and he said: ‘What business have you with it? It has its shoes and its water reserve; it reaches water and eats trees.’