(12) باب شُرْبِ النَّاسِ وَالدَّوَابِّ مِنَ الأَنْهَارِ
Narrated Zaid bin Khalid:
A man came to Allah's Messenger (ﷺ) and asked about Al-Luqata (a fallen thing). The Prophet (ﷺ) said, "Recognize its container and its tying material and then make a public announcement about it for one year and if its owner shows up, give it to him; otherwise use it as you like." The man said, "What about a lost sheep?" The Prophet (ﷺ) said, "It is for you, your brother or the wolf." The man said "What about a lost camel?" The Prophet (ﷺ) said, "Why should you take it as it has got its water-container (its stomach) and its hooves and it can reach the places of water and can eat the trees till its owner finds it?"
Reference: Sahih al-Bukhari 2372
In-book reference: Book 42, Hadith 20
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 40, Hadith 560