והיה עמך עד דרש אחיך אתו והשבתו לו וכן תעשה לשמלתו
The Talmud Bava Metzia 27a, derives from the singling out of simlah, garment, that just as a garment is distinguished in the sense that it has identifying marks and it has claimants, likewise, anything else that has simanim, identifying marks, and has claimants must be announced. This is the source of the derivation that yiush— an object which either has no siman or is lost in a city which has a majority of non-Jewish residents— may be kept by its finder. In both cases, the owner, realizing that his chances of retrieving his possession are slim to nil, will be…