He who found a stray article is himself led astray if he does not advertise it.
Sahih Muslim Book 31, Hadith 12
← Previous Hadith 'Abd al-Rahman b. 'Uthman al-Taimi reported that Allah's Messenger (ﷺ) forbade taking into custody the stray thing of the pilgrims.

Sahih Muslim Book 31, Hadith 11 Next Hadith → None (of you) should milk the animal of another, but with his permission. Does any one of you like that his chamber be raided, and his vaults be broken, and his foodstuff be removed? Verily the treasures for them (those who keep animals) are the udders of the animals which feed them. So none of you should milk the animal of another but with his permission.

Sahih Muslim Book 31, Hadith 13