Sahih Muslim Book - 31, Hadith - 4498

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِىُّ قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ رَبِيعَةَ بْنِ أَبِى عَبْدِ الرَّحْمَنِ عَنْ يَزِيدَ مَوْلَى الْمُنْبَعِثِ عَنْ زَيْدِ بْنِ خَالِدٍ الْجُهَنِىِّ أَنَّهُ قَالَ جَاءَ رَجُلٌ إِلَى النَّبِىِّ -صلى الله عليه وسلم- فَسَأَلَهُ عَنِ اللُّقَطَةِ فَقَالَ « اعْرِفْ عِفَاصَهَا وَوِكَاءَهَا ثُمَّ عَرِّفْهَا سَنَةً فَإِنْ جَاءَ صَاحِبُهَا وَإِلاَّ فَشَأْنَكَ بِهَا ». قَالَ فَضَالَّةُ الْغَنَمِ قَالَ « لَكَ أَوْ لأَخِيكَ أَوْ لِلذِّئْبِ ». قَالَ فَضَالَّةُ الإِبِلِ قَالَ « مَا لَكَ وَلَهَا مَعَهَا سِقَاؤُهَا وَحِذَاؤُهَا تَرِدُ الْمَاءَ وَتَأْكُلُ الشَّجَرَ حَتَّى يَلْقَاهَا رَبُّهَا ». قَالَ يَحْيَى أَحْسِبُ قَرَأْتُ عِفَاصَهَا

It was narrated that Zaid bin Khalid Al-Juhani said: A man came to the Prophet (s.a.w) and asked about picking up lost items. He said: "Memorize the features of its bag and strap, and announce it for a year. Then if its owner comes (give it to him), otherwise it is yours." He said: What about a lost sheep? He (s.a.w) said: "It is either for you or your brother or for the wolf." He said: What about a lost camel? He (s.a.w) said: "What have you to do with it? It has its water supply and its feet, and it can come to the water and eat from the trees, until its master finds it."