Sahih al-bukhari:6112 Chapter: Al-Birr and As-Sila Book 78, Hadith 139

Narrated Zaid bin Khalid Al-Juhani: A man asked Allah’s Messenger (ﷺ) about “Al-Luqata” (a lost fallen purse or a thing picked up by
somebody). The Prophet (ﷺ) said, “You should announce it publicly for one year, and then remember and
recognize the tying material of its container, and then you can spend it. If its owner came to you, then
you should pay him its equivalent.” The man said, “O Allah’s Messenger (ﷺ)! What about a lost sheep?” The
Prophet said, “Take it because it is for you, for your brother, or for the wolf.” The man again said, “O
Allah’s Messenger (ﷺ)! What about a lost camel?” Allah’s Messenger (ﷺ) became very angry and furious and his
cheeks became red (or his face became red), and he said, “You have nothing to do with it (the camel)
for it has its food and its water container with it till it meets its owner.”