Sunan an-Nasa'i al-Kubra 5798
Muḥammad b. Ismāʿīl b. Ibrāhīm > al-Anṣārī > ʿUbaydullāh b. al-Akhnas > ʿAmr b. Shuʿayb from his father from his grandfather > Abū Thaʿlabah
I said, "O Messenger of Allah, advise me regarding the found property." He said, "If you find it on a dead-end road or in an inhabited village, announce it for a year. If you do not find its owner, then you may keep it." And he narrated the hadith.
أَخْبَرَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ عَنِ الْأَنْصَارِيِّ عَنْ عُبَيْدِ اللهِ بْنِ الْأَخْنَسِ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ عَنْ أَبِي ثَعْلَبَةَ قَالَ
قُلْتُ يَا رَسُولَ اللهِ أَفْتِنِي فِي اللُّقَطَةِ قَالَ «مَا وَجَدْتَهُ فِي طَرِيقٍ مَيْتَاءٍ أَوْ فِي قَرْيَةٍ عَامِرَةٍ فَعَرِّفْهُ سَنَةً إِنْ لَمْ تَجِدْ صَاحِبَهُ» وَسَاقَ الْحَدِيثَ