It is narrated from Sayyiduna Zayd bin Khalid Al-Juhani (may Allah be pleased with him) that a man came to the Messenger of Allah (peace and blessings be upon him) and asked: "What is the ruling regarding a lost item?" The Prophet (peace and blessings be upon him) said: "Recognize its pouch and its tie, then announce it for a year. If its owner comes, hand it over to him; if not, then benefit from it." The man asked about a lost goat. The Prophet (peace and blessings be upon him) said: "It is yours, or your brother's, or the wolf's." The man asked about a lost camel. The Prophet (peace and blessings be upon him) said: "It has its water-bag and its feet with it; it can reach water and eat from the trees until its owner finds it."
Hadith Referenceالسنن المأثورة / باب ما جاء في فدية الأذى / 493
Hadith Takhrijصحیح بخاری، اللقطة، باب اذا لم یوجد صاحب اللقطة بعد سنة فهی لمن وجدها، رقم: 2429، صحیح مسلم، اللقطة، رقم: 1722۔