'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
← Previous Hadith " If someone comes and informs you about the number (of articles) of the bag and the straps, then give that to him." Sufyan has made this addition in the narration of Waki':" Otherwise it is like your property." And in the narration of Ibn Numair the words are:" Otherwise make use of that."

Sahih Muslim Book 31, Hadith 10 Next Hadith → He who found a stray article is himself led astray if he does not advertise it.

Sahih Muslim Book 31, Hadith 12