Volume 3, Book 42, Number 611:
Narrated Zaid bin Khalid:
A man came and asked Allah’s Apostle about picking a lost thing. The Prophet said, “Remember the
description of its container and the string it is tied with, and make public announcement about it for
one year. If the owner shows up, give it to him; otherwise, do whatever you like with it.” He then
asked, “What about a lost sheep?” The Prophet said, “It is for you, for your brother (i.e. its owner), or
for the wolf.” He further asked, “What about a lost camel?” The Prophet said, “It is none of your con –
cern. It has its water-container (reservoir) and its feet, and it will reach water and drink it and eat
the trees till its owner finds it.”